@prefix rdf: . @prefix dbr: . @prefix yago: . dbr:UBV_photometric_system rdf:type yago:PhysicalEntity100001930 , yago:Object100002684 , yago:Whole100003553 , yago:Artifact100021939 , yago:System104377057 , yago:Instrumentality103575240 , yago:WikicatPhotometricSystems . @prefix rdfs: . dbr:UBV_photometric_system rdfs:label "Sistema fotom\u00E9trico UBV"@es , "UBV\u6D4B\u5149\u7CFB\u7EDF"@zh , "Sistema fotom\u00E8tric UBV"@ca , "Syst\u00E8me photom\u00E9trique UBV"@fr , "UBV photometric system"@en , "\u30B8\u30E7\u30F3\u30BD\u30F3\u306EUBV\u30B7\u30B9\u30C6\u30E0"@ja , "UBV syst\u00E9m"@cs , "UBV-System"@de , "\u0424\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043A\u0430\u044F \u0441\u0438\u0441\u0442\u0435\u043C\u0430 UBV"@ru , "\u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV"@uk , "UBV \uCE21\uAD11\uACC4"@ko , "Sistema fotometrico UBV"@it , "Sistema fotom\u00E9trico UBV"@pt , "\u0646\u0638\u0627\u0645 \u0627\u0644\u0642\u064A\u0627\u0633 \u0627\u0644\u0636\u0648\u0626\u064A UBV"@ar ; rdfs:comment "Il sistema fotometrico UBV, detto anche sistema di Johnson (o sistema di Johnson-Morgan), \u00E8 un sistema fotometrico a banda larga per la classificazione delle stelle in base al loro colore. \u00C8 stato tra i primi sistemi fotometrici ad essere standardizzato. Inizialmente concepito per essere utilizzato con fotometri fotoelettrici Philips 1PP21 \u00E8 stato poi lievemente modificato per adattarsi anche ad altri tipi di rivelatori. Le lettere U, B, V indicano magnitudine ultravioletta, blu e visuale, misurate per una stella per poterla classificare in un sistema UBV. La scelta dei colori sulla parte finale verso il blu nello spettro \u00E8 dovuta al fatto che le lastre fotografiche sono meglio impressionate da questi colori. Fu introdotto negli anni cinquanta dagli astronomi statunitensi e William Wilson"@it , "El sistema fotom\u00E8tric UBV, tamb\u00E9 conegut com a sistema Johnson (o sistema Johnson-Morgan), \u00E9s un sistema fotom\u00E8tric de banda ampla per classificar estels segons el seu color. Es tracta del primer sistema fotom\u00E8tric fotoel\u00E8ctric estandarditzat. Les lletres U, B, i V fan refer\u00E8ncia a l'ultraviolat, el blau, i a magnitud visual. L'elecci\u00F3 dels colors a l'extrem del blau de l'espectre \u00E9s a causa de la tend\u00E8ncia que t\u00E9 la pel\u00B7l\u00EDcula fotogr\u00E0fica per aquests colors. Fou introdu\u00EFt el 1950 pels astr\u00F2noms americans Harold Johnson i William Wilson Morgan."@ca , "Le syst\u00E8me photom\u00E9trique UBV, appel\u00E9 \u00E9galement syst\u00E8me de Johnson (ou syst\u00E8me de Johnson-Morgan), est un syst\u00E8me photom\u00E9trique \u00E0 large bande pour classer les \u00E9toiles selon leurs couleurs. C'est le premier syst\u00E8me photom\u00E9trique photo\u00E9lectrique standardis\u00E9. Les lettres U, B et V correspondent aux magnitudes ultraviolette, bleue et visible (ou verte), qui sont mesur\u00E9es pour une \u00E9toile afin de la classer dans le syst\u00E8me UBV. Le choix des couleurs \u00E0 l'extr\u00E9mit\u00E9 bleue du spectre est li\u00E9 au biais que la pellicule photographique pr\u00E9sente pour ces couleurs. Il fut introduit dans les ann\u00E9es 1950 par les astronomes am\u00E9ricains Harold Lester Johnson et William Wilson Morgan."@fr , "The UBV photometric system (from Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually employed for classifying stars according to their colors. It was the first standardized photometric system. The apparent magnitudes of stars in the system are often used to determine the color indices B-V and U-B, the difference between the B and V magnitudes and the U and B magnitudes respectively."@en , "\u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV (\u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430 \u0438\u043B\u0438 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430 \u2014 \u041C\u043E\u0440\u0433\u0430\u043D\u0430) \u2014 \u043D\u0430\u0438\u0431\u043E\u043B\u0435\u0435 \u0448\u0438\u0440\u043E\u043A\u043E \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u0443\u0435\u043C\u0430\u044F \u0448\u0438\u0440\u043E\u043A\u043E\u043F\u043E\u043B\u043E\u0441\u043D\u0430\u044F \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043A\u0430\u044F \u0441\u0438\u0441\u0442\u0435\u043C\u0430. \u0420\u0430\u0437\u0440\u0430\u0431\u043E\u0442\u0430\u043D\u0430 \u0432 1950-\u0445 \u0433\u043E\u0434\u0430\u0445 \u0430\u043C\u0435\u0440\u0438\u043A\u0430\u043D\u0441\u043A\u0438\u043C\u0438 \u0430\u0441\u0442\u0440\u043E\u043D\u043E\u043C\u0430\u043C\u0438 \u0413\u0430\u0440\u043E\u043B\u044C\u0434\u043E\u043C \u041B. \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u043E\u043C \u0438 \u0423\u0438\u043B\u044C\u044F\u043C\u043E\u043C \u0423. \u041C\u043E\u0440\u0433\u0430\u043D\u043E\u043C \u0434\u043B\u044F \u043A\u043B\u0430\u0441\u0441\u0438\u0444\u0438\u043A\u0430\u0446\u0438\u0438 \u0437\u0432\u0451\u0437\u0434 \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043C\u043E\u0441\u0442\u0438 \u043E\u0442 \u0438\u0445 \u0446\u0432\u0435\u0442\u0430."@ru , "Das UBV-System ist ein breitbandiges fotometrisches System, mit dem zahlreiche Sterne vermessen wurden. Es wird auch Johnson- oder Johnson-Morgan-System genannt nach den Astronomen Harold Lester Johnson und William Wilson Morgan, die es in den 1950er Jahren einf\u00FChrten."@de , "El Sistema fotom\u00E9trico UBV , tambi\u00E9n conocido como Sistema de Harold Johnson (o sistema de Johnson-Morgan), es un sistema fotom\u00E9trico de banda ancha para la clasificaci\u00F3n estelar regido en funci\u00F3n del color del astro. Es el primer sistema fotom\u00E9trico estandarizado. Las letras U, B y V indican respectivamente Ultravioleta, azul y espectro visible, las cuales son medidas para clasificar a una estrella en el sistema UBV.\u200B La elecci\u00F3n de colores pertenecientes al extremo azul del espectro se debe a la tendencia que tiene el papel fotogr\u00E1fico a captar estos colores. Fue introducido en 1950 por el astr\u00F3nomo americano Harold Lester Johnson y William Wilson Morgan."@es , "\u0646\u0638\u0627\u0645 \u0627\u0644\u0642\u064A\u0627\u0633 \u0627\u0644\u0636\u0648\u0626\u064A UBV (\u0641\u0648\u0642 \u0628\u0646\u0641\u0633\u062C\u064A\u060C \u0623\u0632\u0631\u0642\u060C \u0628\u0635\u0631\u064A)\u060C \u064A\u0633\u0645\u0649 \u0623\u064A\u0636\u0627 \u0646\u0638\u0627\u0645 (\u0623\u0648 \u0646\u0638\u0627\u0645 \u062C\u0648\u0646\u0633\u0648\u0646 \u0645\u0648\u0631\u063A\u0627\u0646)\u060C \u0647\u0648 \u0646\u0638\u0627\u0645 \u0642\u064A\u0627\u0633 \u0636\u0648\u0626\u064A \u0639\u0631\u064A\u0636 \u0627\u0644\u0646\u0637\u0627\u0642 \u0644\u062A\u0635\u0646\u064A\u0641 \u0627\u0644\u0646\u062C\u0648\u0645 \u0648\u0641\u0642\u0627 \u0644\u0623\u0644\u0648\u0627\u0646\u0647\u0627. \u0648\u0647\u0648 \u0623\u0648\u0644 \u0646\u0638\u0627\u0645 \u0643\u0647\u0631\u0648\u0636\u0648\u0626\u064A \u0645\u0648\u062D\u062F \u0645\u0639\u0631\u0648\u0641 \u062E\u0627\u0635 \u0628\u0642\u064A\u0627\u0633 \u0627\u0644\u0636\u0648\u0621 . \u0627\u0644\u062D\u0631\u0648\u0641 U\u060C B\u060C \u0648 V \u062A\u062F\u0644 \u0639\u0644\u0649 \u0627\u0644\u0645\u0642\u062F\u0627\u0631 \u0641\u0648\u0642 \u0627\u0644\u0628\u0646\u0641\u0633\u062C\u064A \u0648\u0627\u0644\u0623\u0632\u0631\u0642 \u0648\u0627\u0644\u0628\u0635\u0631\u064A\u060C \u0648\u0627\u0644\u062A\u064A \u064A\u062A\u0645 \u0642\u064A\u0627\u0633\u0647\u0627 \u0644\u0646\u062C\u0645 \u0645\u0646 \u0623\u062C\u0644 \u062A\u0635\u0646\u064A\u0641\u0629 \u0641\u064A \u0646\u0638\u0627\u0645 UBV. \u0627\u062E\u062A\u064A\u0627\u0631 \u0627\u0644\u0623\u0644\u0648\u0627\u0646 \u0639\u0644\u0649 \u0627\u0644\u0637\u0631\u0641 \u0627\u0644\u0623\u0632\u0631\u0642 \u0645\u0646 \u0627\u0644\u0637\u064A\u0641 \u0647\u0648 \u0628\u0633\u0628\u0628 \u062A\u062D\u064A\u0632 \u0627\u0644\u0641\u064A\u0644\u0645 \u0627\u0644\u0641\u0648\u062A\u0648\u063A\u0631\u0627\u0641\u064A \u0644\u062A\u0644\u0643 \u0627\u0644\u0623\u0644\u0648\u0627\u0646. \u0648\u0644\u0642\u062F \u062A\u0645 \u0639\u0631\u0636 \u0627\u0644\u0646\u0638\u0627\u0645 \u0641\u064A \u0627\u0644\u062E\u0645\u0633\u064A\u0646\u0627\u062A \u0645\u0646 \u0642\u0628\u0644 \u0627\u0644\u0641\u0644\u0643\u064A\u064A\u0646 \u0627\u0644\u0623\u0645\u0631\u064A\u0643\u064A\u064A\u0646 \u0647\u0627\u0631\u0648\u0644\u062F \u0644\u064A\u0633\u062A\u0631 \u062C\u0648\u0646\u0633\u0648\u0646 \u0648\u0648\u064A\u0644\u064A\u0627\u0645 \u0648\u064A\u0644\u0633\u0648\u0646 \u0645\u0648\u0631\u063A\u0627\u0646 \u0645\u0633\u062A\u062E\u062F\u0645\u064A\u0646 \u062A\u0644\u064A\u0633\u0643\u0648\u0628 13 \u00AB\u0648 82\u00BB \u0641\u064A \u0645\u0631\u0635\u062F \u0645\u0627\u0643\u062F\u0648\u0646\u0627\u0644\u062F \u0644\u062A\u062D\u062F\u064A\u062F \u0627\u0644\u0646\u0638\u0627\u0645."@ar , "UBV syst\u00E9m \u010Di Johnson\u016Fv syst\u00E9m nebo i Johnson\u016Fv-Morgan\u016Fv syst\u00E9m je \u0161irokop\u00E1smov\u00FD pro klasifikaci hv\u011Bzd podle jejich barvy. Je to prvn\u00ED zn\u00E1m\u00FD standardizovan\u00FD fotometrick\u00FD syst\u00E9m. P\u00EDsmena U, B a V znamenaj\u00ED ultrafialov\u00E9, modr\u00E9 (blue) a vizu\u00E1ln\u00ED magnitudy, kter\u00E9 se m\u011B\u0159\u00ED na hv\u011Bzd\u011B pro klasifikaci v tomto syst\u00E9mu. Volba barev je pr\u00E1v\u011B takov\u00E1, proto\u017Ee fotografick\u00FD film je citliv\u00FD na tyto barvy. Syst\u00E9m zavedli v 50. letech 20. stolet\u00ED ameri\u010Dt\u00ED astronomov\u00E9 a ."@cs , "\u30B8\u30E7\u30F3\u30BD\u30F3\u306E UBV \u30B7\u30B9\u30C6\u30E0\u3001\u307E\u305F\u306F\u30B8\u30E7\u30F3\u30BD\u30F3\u30FB\u30E2\u30FC\u30AC\u30F3\u30FB\u30B7\u30B9\u30C6\u30E0 \uFF08UBV photometric system\u307E\u305F\u306FJohnson system\u307E\u305F\u306FJohnson-Morgan system\uFF09\u306F\u5E83\u304F\u7528\u3044\u3089\u308C\u3066\u3044\u308B\u6052\u661F\u306E\u3067\u3001\u7D2B\u5916\u57DF\uFF08U:ultraviolet\uFF09\u3001\u9752\u8272\u57DF\uFF08B:blue\uFF09\u3001\u5B9F\u8996\u57DF\uFF08V:visual\uFF09\u306E3\u8272\u306E\u30D5\u30A3\u30EB\u30BF\u30FC\u3068\u691C\u51FA\u5668\u3068\u3057\u3066RCA\u88FD1P21\u5149\u96FB\u5B50\u5897\u500D\u7BA1\u306E\u7D44\u3092\u3082\u3061\u3044\u3066\u5929\u4F53\u306E\u660E\u308B\u3055\u3092\u6E2C\u5B9A\u3057\u305F\u6A19\u6E96\u661F\u30AB\u30BF\u30ED\u30B0\u3067\u5B9A\u7FA9\u3057\u305F\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u3067\u3042\u308B\u30021950\u5E74\u4EE3\u306B\u30A2\u30E1\u30EA\u30AB\u5408\u8846\u56FD\u306E\u5929\u6587\u5B66\u8005\u3001\u30CF\u30ED\u30EB\u30C9\u30FB\u30EC\u30B9\u30BF\u30FC\u30FB\u30B8\u30E7\u30F3\u30BD\u30F3\u3068\u30A6\u30A3\u30EA\u30A2\u30E0\u30FB\u30A6\u30A3\u30EB\u30BD\u30F3\u30FB\u30E2\u30FC\u30AC\u30F3\u306B\u3088\u3063\u3066\u5C0E\u5165\u3055\u308C\u305F\u3002 \u30D5\u30A3\u30EB\u30BF\u30FC\u306F\u3001\u691C\u51FA\u5668\u3068\u7D44\u307F\u5408\u308F\u305B\u305F\u969B\u306B\u3001\u30B8\u30E7\u30F3\u30BD\u30F3\u306E\u30AA\u30EA\u30B8\u30CA\u30EB\u306EUBV\u306E\u5206\u5149\u7279\u6027\u306B\u3067\u304D\u308B\u3060\u3051\u4F1A\u3046\u3088\u3046\u306B\u9078\u3070\u308C\u308B\u3002\u305D\u308C\u305E\u308C\u5E73\u5747\u6CE2\u9577\u304CU\u3067\u306F 364 nm\u3001B\u306F 442 nm\u3001V\u306F 540 nm\u3067\u3042\u308B\u304C\u3001\u5358\u306B\u5E73\u5747\u6CE2\u9577\u304C\u5408\u3063\u3066\u3044\u308C\u3070\u3088\u3044\u3068\u3044\u3046\u3082\u306E\u3067\u306F\u306A\u3044\u3002"@ja , "\u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV (\u0430\u0431\u043E \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430) \u2014 \u0448\u0438\u0440\u043E\u043A\u043E\u0441\u043C\u0443\u0433\u043E\u0432\u0430 \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0434\u043B\u044F \u043A\u043B\u0430\u0441\u0438\u0444\u0456\u043A\u0430\u0446\u0456\u0457 \u0437\u0456\u0440 \u0437\u0430 \u043A\u043E\u043B\u044C\u043E\u0440\u043E\u043C. \u0412\u0456\u0434\u043E\u043C\u0430 \u044F\u043A \u043F\u0435\u0440\u0448\u0430 \u0441\u0442\u0430\u043D\u0434\u0430\u0440\u0442\u0438\u0437\u043E\u0432\u0430\u043D\u0430 \u0444\u043E\u0442\u043E\u0435\u043B\u0435\u043A\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430."@uk , "UBV\u6D4B\u5149\u7CFB\u7EDF\uFF0C\u662F\u4E00\u79CD\u5929\u6587\u5B66\u4E0A\u5E38\u7528\u7684\u4E09\u8272\u5BBD\u5E26\u6D4B\u5149\u7CFB\u7EDF\uFF0C\u662F\u56FD\u9645\u4E0A\u7684\u6807\u51C6\u6D4B\u5149\u7CFB\u7EDF\u3002UBV\u6D4B\u5149\u7CFB\u7EDF\u662F1950\u5E74\u4EE3\u7531\u7F8E\u56FD\u5929\u6587\u5B66\u5BB6\u7EA6\u7FF0\u900A\u548C\u6469\u6839\uFF08W.W.Morgen\uFF09\u4F7F\u7528\u9EA6\u514B\u5510\u7EB3\u5929\u6587\u53F0\u53E3\u5F84\u4E3A33\u5398\u7C73\u548C2.08\u7C73\u7684\u53CD\u5C04\u671B\u8FDC\u955C\uFF0C\u52A0U\u3001B\u3001V\u4E09\u4E2A\u6CE2\u6BB5\u7684\u6EE4\u5149\u7247\u521B\u7ACB\u7684\uFF0C\u56E0\u6B64\u53C8\u79F0\u7EA6\u7FF0\u900A-\u6469\u6839\u7CFB\u7EDF\uFF08Johnson-Morgan system\uFF09\u3002UBV\u6D4B\u5149\u7CFB\u7EDF\u7684\u661F\u7B49\u503C\u5E38\u7528V\u661F\u7B49\u548C\u8272\u6307\u6570B-V\u548CU-B\u8868\u793A\u3002\u4E3A\u786E\u5B9A\u5176\u96F6\u70B9\uFF0C\u9009\u53D6\u4E866\u9897\u5149\u8C31\u985E\u578B\u4E3AA0V\u7684\u6052\u661F\uFF0C\u53D6\u5176\u5E73\u5747\u8272\u6307\u6570\u4E3A\u96F6\u3002 UBV\u6D4B\u5149\u7CFB\u7EDF\u8981\u6C42\u4F7F\u7528RCA 1P21\u578B\u5149\u7535\u500D\u589E\u7BA1\uFF0C\u5176\u4E2DU\u6CE2\u6BB5\u6CE2\u957F\u4E3A360\u7EB3\u7C73\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 9863\u6EE4\u5149\u7247\u6D4B\u5F97\uFF0C\u4E3A\u8FD1\u7D2B\u5916\u7EBF\u6210\u4EFD\uFF0C\u6240\u5F97\u4E3A\u7D2B\u5916\u661F\u7B49\u3002B\u6CE2\u6BB5\u6CE2\u957F\u4E3A440nm\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 5030\u6EE4\u5149\u7247\u52A0\u539A\u5EA6\u4E3A2\u6BEB\u7C73\u7684Schott GG 13\u6D4B\u5F97\uFF0C\u6D4B\u91CF\u84DD\u8272\u6210\u5206\uFF0C\u6240\u5F97\u4E3A\u84DD\u8272\u661F\u7B49\u3002V\u6CE2\u6BB5\u6CE2\u957F\u4E3A550nm\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 3384\u6EE4\u5149\u7247\u6D4B\u5F97\uFF0C\u6D4B\u91CF\u9EC4\u3001\u7EFF\u8272\u6210\u5206\uFF0C\u548C\u4EBA\u773C\u6240\u89C1\u4EAE\u5EA6\u63A5\u8FD1\uFF0C\u6240\u5F97\u4E3A\u53EF\u89C1\u661F\u7B49\u3002 \u7C7B\u4F3C\u7684\u6D4B\u5149\u7CFB\u7EDF\u8FD8\u6709\u66F4\u590D\u6742\u7684uvby\u6D4B\u5149\u7CFB\u7EDF\u548CStebbins-Whitford-Kron\u516D\u8272\uFF08UVBRGI\uFF09\u7CFB\u7EDF\u7B49\u3002"@zh , "O sistema fotom\u00E9trico UBV, tamb\u00E9m chamado sistema Johnson (ou sistema Johnson-Morgan) \u00E9 um sistema fotom\u00E9trico de banda larga que utiliza um conjunto de tr\u00EAs especiais, designados pelas letras U, B, e V, que filtram a luz de uma estrela, deixando passar apenas bandas espec\u00EDficas do espectro eletromagn\u00E9tico. As bandas s\u00E3o posicionadas na regi\u00E3o do ultravioleta (U), na regi\u00E3o do azul (B), e na regi\u00E3o da luz vis\u00EDvel (V) do espectro luminoso. Desta forma, pode-se medir a magnitude da estrela em cada uma das bandas e determinar os \u00EDndices de cor, B-V e U-B."@pt , "UBV \uCE21\uAD11\uACC4(UBV photometric system \uB610\uB294 Johnson system \uB610\uB294 Johnson-Morgan system)\uC740 \uB113\uC9C0\uB3C4 \uD769\uC5B4\uC838\uC9C0\uACE0 \uC788\uB294 \uD56D\uC131\uC758 \uBD84\uB958\uBC95\uC73C\uB85C, \uC790\uC678\uC5ED(U:ultraviolet), \uCCAD\uC0C9\uC5ED(B:blue), \uC2E4\uC2DC\uC5ED(V:visual)\uC758 3\uC0C9 \uD544\uD130\uB97C \uAC00\uC9C4 \uCC9C\uCCB4\uC758 \uBC1D\uAE30\uB97C \uCE21\uC815\uD574, \uD56D\uC131\uC758 \uC0C9\uC73C\uB85C \uBD84\uB958\uD558\uB294 \uBC29\uBC95\uC774\uB2E4. \uD45C\uC900\uD654\uB41C \uCD5C\uCD08\uC758 \uC774\uB2E4. 1950\uB144\uB300\uC5D0 \uC544\uBA54\uB9AC\uCE74 \uD569\uC911\uAD6D\uC758 \uCC9C\uBB38\uD559\uC790, \uACFC \uC5D0 \uC758\uD574\uC11C \uB3C4\uC785\uB418\uC5C8\uB2E4. \uD544\uD130\uB294 \uAC01\uAC01 \uD3C9\uADE0 \uD30C\uC7A5\uC774 U\uC5D0\uC11C\uB294 364 nm, B\uB294 442 nm, V\uB294 540 nm\uAC00 \uB418\uB3C4\uB85D \uC120\uD0DD\uB41C\uB2E4. \uC131\uAC04 \uD761\uC218\uC5D0 \uC758\uD55C \uC801\uD654\uC5D0 \uC601\uD5A5\uC744 \uBC1B\uC9C0 \uC54A\uAC8C B-V\uC640 U-B\uC758 \uAC10\uB3C4\uCC28\uC774\uB294 \uAE30\uC900\uC774 \uB418\uB294 AO V\uBCC4\uB85C \uC81C\uB85C\uAC00 \uB418\uB3C4\uB85D \uAD50\uC815\uB41C\uB2E4. UBV \uCE21\uAD11\uACC4\uB294 \uC790\uC678\uC120\uC774 \uD544\uD130 \uBFD0\uB9CC\uC774 \uC544\uB2C8\uB77C, \uC9C0\uAD6C\uC758 \uB300\uAE30\uC5D0 \uC758\uD574\uC11C \uD761\uC218\uB418\uAE30 \uB54C\uBB38\uC5D0, \uB300\uAE30\uC758 \uC0C1\uD669\uC774\uB098 \uAD00\uCE21\uC9C0\uC758 \uB192\uC774\uC5D0 \uC758\uD574\uC11C \uC601\uD5A5\uC744 \uBC1B\uB294\uB2E4\uB294 \uACB0\uC810\uC744 \uAC16\uACE0 \uC788\uC9C0\uB9CC, \uBC1D\uC740 \uD56D\uC131\uC744 \uD3EC\uD568\uD55C \uB9E4\uC6B0 \uB9CE\uC740 \uD56D\uC131\uC774 \uC774 \uBC29\uBC95\uC73C\uB85C \uBD84\uB958\uB418\uC5B4 \uC654\uB2E4."@ko . @prefix foaf: . dbr:UBV_photometric_system foaf:depiction . @prefix dcterms: . @prefix dbc: . dbr:UBV_photometric_system dcterms:subject dbc:Stellar_astronomy , dbc:Photometric_systems , dbc:American_inventions . @prefix dbo: . dbr:UBV_photometric_system dbo:wikiPageID 5731588 ; dbo:wikiPageRevisionID 1115801489 ; dbo:wikiPageWikiLink dbr:Apparent_magnitudes , dbc:Stellar_astronomy , dbr:Effective_temperature , dbc:American_inventions , dbr:Interstellar_reddening , dbr:Photometric_system , dbr:United_States , dbr:Alan_William_James_Cousins , dbr:Otto_Struve_Telescope , dbr:Color_index , dbr:Color_indices , , dbr:Astronomer , , dbr:McDonald_Observatory , dbr:Stellar_classification , dbr:William_Wilson_Morgan , dbr:A-type_main-sequence_star , , , dbc:Photometric_systems . @prefix owl: . @prefix dbpedia-lb: . dbr:UBV_photometric_system owl:sameAs dbpedia-lb:UBV-System , , , . @prefix dbpedia-it: . dbr:UBV_photometric_system owl:sameAs dbpedia-it:Sistema_fotometrico_UBV , , . @prefix dbpedia-ms: . dbr:UBV_photometric_system owl:sameAs dbpedia-ms:Sistem_fotometrik_UBV , . @prefix dbpedia-ro: . dbr:UBV_photometric_system owl:sameAs dbpedia-ro:Sistem_fotometric_UBV , , , , . @prefix dbpedia-de: . dbr:UBV_photometric_system owl:sameAs dbpedia-de:UBV-System , . @prefix yago-res: . dbr:UBV_photometric_system owl:sameAs yago-res:UBV_photometric_system , . @prefix wikidata: . dbr:UBV_photometric_system owl:sameAs wikidata:Q129833 . @prefix ns16: . dbr:UBV_photometric_system owl:sameAs ns16:K8p7 , , . @prefix dbpedia-tr: . dbr:UBV_photometric_system owl:sameAs dbpedia-tr:UBV_fotometrik_sistemi . @prefix dbp: . @prefix dbt: . dbr:UBV_photometric_system dbp:wikiPageUsesTemplate dbt:Efn , dbt:Portal , dbt:Notelist , dbt:Cvt , dbt:Reflist , dbt:Star ; dbo:thumbnail ; dbo:abstract "\u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV (\u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430 \u0438\u043B\u0438 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430 \u2014 \u041C\u043E\u0440\u0433\u0430\u043D\u0430) \u2014 \u043D\u0430\u0438\u0431\u043E\u043B\u0435\u0435 \u0448\u0438\u0440\u043E\u043A\u043E \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u0443\u0435\u043C\u0430\u044F \u0448\u0438\u0440\u043E\u043A\u043E\u043F\u043E\u043B\u043E\u0441\u043D\u0430\u044F \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u0435\u0441\u043A\u0430\u044F \u0441\u0438\u0441\u0442\u0435\u043C\u0430. \u0420\u0430\u0437\u0440\u0430\u0431\u043E\u0442\u0430\u043D\u0430 \u0432 1950-\u0445 \u0433\u043E\u0434\u0430\u0445 \u0430\u043C\u0435\u0440\u0438\u043A\u0430\u043D\u0441\u043A\u0438\u043C\u0438 \u0430\u0441\u0442\u0440\u043E\u043D\u043E\u043C\u0430\u043C\u0438 \u0413\u0430\u0440\u043E\u043B\u044C\u0434\u043E\u043C \u041B. \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u043E\u043C \u0438 \u0423\u0438\u043B\u044C\u044F\u043C\u043E\u043C \u0423. \u041C\u043E\u0440\u0433\u0430\u043D\u043E\u043C \u0434\u043B\u044F \u043A\u043B\u0430\u0441\u0441\u0438\u0444\u0438\u043A\u0430\u0446\u0438\u0438 \u0437\u0432\u0451\u0437\u0434 \u0432 \u0437\u0430\u0432\u0438\u0441\u0438\u043C\u043E\u0441\u0442\u0438 \u043E\u0442 \u0438\u0445 \u0446\u0432\u0435\u0442\u0430. \u0412 \u044D\u0442\u043E\u0439 \u0441\u0438\u0441\u0442\u0435\u043C\u0435 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\u043E\u0431\u0440\u0430\u0437\u043E\u043C, \u0447\u0442\u043E \u0434\u043B\u044F \u0437\u0432\u0451\u0437\u0434 \u0441\u043F\u0435\u043A\u0442\u0440\u0430\u043B\u044C\u043D\u043E\u0433\u043E \u043A\u043B\u0430\u0441\u0441\u0430 A0 V \u0431\u0435\u0437 \u043C\u0435\u0436\u0437\u0432\u0451\u0437\u0434\u043D\u043E\u0433\u043E \u043F\u043E\u043A\u0440\u0430\u0441\u043D\u0435\u043D\u0438\u044F \u0432\u0441\u0435 \u0442\u0440\u0438 \u0432\u0435\u043B\u0438\u0447\u0438\u043D\u044B \u0440\u0430\u0432\u043D\u044B \u0434\u0440\u0443\u0433 \u0434\u0440\u0443\u0433\u0443. \u0422\u0430\u043A\u0438\u043C \u043E\u0431\u0440\u0430\u0437\u043E\u043C, \u0443 \u0442\u0430\u043A\u0438\u0445 \u0437\u0432\u0451\u0437\u0434 \u043F\u043E\u043A\u0430\u0437\u0430\u0442\u0435\u043B\u0438 \u0446\u0432\u0435\u0442\u0430 B\u2212V \u0438 U\u2212B \u2014 \u0440\u0430\u0437\u043D\u043E\u0441\u0442\u0438 \u0437\u0432\u0451\u0437\u0434\u043D\u044B\u0445 \u0432\u0435\u043B\u0438\u0447\u0438\u043D \u0432 \u0440\u0430\u0437\u043D\u044B\u0445 \u043F\u043E\u043B\u043E\u0441\u0430\u0445 \u2014 \u0440\u0430\u0432\u043D\u044B \u043D\u0443\u043B\u044E. \u041F\u043E\u043A\u0430\u0437\u0430\u0442\u0435\u043B\u0438 \u0446\u0432\u0435\u0442\u0430 (U\u2212B) \u0438 (B\u2212V) \u043C\u043E\u0436\u043D\u043E \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u043E\u0432\u0430\u0442\u044C \u0434\u043B\u044F \u043E\u043F\u0440\u0435\u0434\u0435\u043B\u0435\u043D\u0438\u044F \u043D\u0435\u043A\u043E\u0442\u043E\u0440\u044B\u0445 \u0444\u0438\u0437\u0438\u0447\u0435\u0441\u043A\u0438\u0445 \u0441\u0432\u043E\u0439\u0441\u0442\u0432 \u043E\u0442\u0434\u0435\u043B\u044C\u043D\u044B\u0445 \u0437\u0432\u0451\u0437\u0434 \u0438\u043B\u0438 \u0438\u0445 \u0433\u0440\u0443\u043F\u043F. \u041D\u0430\u0438\u0431\u043E\u043B\u0435\u0435 \u0447\u0430\u0441\u0442\u043E \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u0443\u0435\u0442\u0441\u044F \u0440\u0430\u0437\u043D\u043E\u0441\u0442\u044C (B\u2212V), \u043F\u0440\u0438\u0447\u0435\u043C B \u0438 V, \u0435\u0441\u043B\u0438 \u0433\u043E\u0432\u043E\u0440\u0438\u0442\u044C \u043E\u0447\u0435\u043D\u044C \u0443\u043F\u0440\u043E\u0449\u0451\u043D\u043D\u043E, \u0441\u043E\u043E\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044E\u0442 \u0444\u043E\u0442\u043E\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043A\u043E\u0439 \u0438 \u0432\u0438\u0437\u0443\u0430\u043B\u044C\u043D\u043E\u0439 \u0437\u0432\u0435\u0437\u0434\u043D\u044B\u043C \u0432\u0435\u043B\u0438\u0447\u0438\u043D\u0430\u043C. \u041F\u043E\u043A\u0430\u0437\u0430\u0442\u0435\u043B\u044C \u0446\u0432\u0435\u0442\u0430 (B\u2212V) \u0443\u0434\u043E\u0431\u0435\u043D \u043F\u043E\u0442\u043E\u043C\u0443, \u0447\u0442\u043E \u0434\u043B\u044F \u0431\u043E\u043B\u044C\u0448\u0438\u043D\u0441\u0442\u0432\u0430 \u0437\u0432\u0451\u0437\u0434 \u043E\u043D \u043E\u0442\u043D\u043E\u0441\u0438\u0442\u0435\u043B\u044C\u043D\u043E \u0431\u044B\u0441\u0442\u0440\u043E \u0438 \u043B\u0435\u0433\u043A\u043E \u0438\u0437\u043C\u0435\u0440\u044F\u0435\u0442\u0441\u044F, \u043E\u0441\u0442\u0430\u0432\u0430\u044F\u0441\u044C \u0445\u043E\u0440\u043E\u0448\u0438\u043C \u0438\u043D\u0434\u0438\u043A\u0430\u0442\u043E\u0440\u043E\u043C \u0441\u043F\u0435\u043A\u0442\u0440\u0430\u043B\u044C\u043D\u043E\u0433\u043E \u043A\u043B\u0430\u0441\u0441\u0430. \u042D\u0442\u043E \u043E\u0434\u043D\u0430 \u0438\u0437 \u043F\u0435\u0440\u0435\u043C\u0435\u043D\u043D\u044B\u0445, \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u0443\u0435\u043C\u044B\u0445 \u043F\u0440\u0438 \u043F\u043E\u0441\u0442\u0440\u043E\u0435\u043D\u0438\u0438 \u0434\u0438\u0430\u0433\u0440\u0430\u043C\u043C\u044B \u0446\u0432\u0435\u0442 \u2014 \u0437\u0432\u0451\u0437\u0434\u043D\u0430\u044F \u0432\u0435\u043B\u0438\u0447\u0438\u043D\u0430 (\u0434\u0438\u0430\u0433\u0440\u0430\u043C\u043C\u0430 \u0413\u0435\u0440\u0446\u0448\u043F\u0440\u0443\u043D\u0433\u0430 \u2014 \u0420\u0430\u0441\u0441\u0435\u043B\u0430). \u0427\u0442\u043E\u0431\u044B \u0440\u0430\u0441\u0448\u0438\u0440\u0438\u0442\u044C \u0432\u043E\u0437\u043C\u043E\u0436\u043D\u043E\u0441\u0442\u0438 \u043C\u0435\u0442\u043E\u0434\u0430, \u0432 1965 \u0433\u043E\u0434\u0443 \u0414\u0436\u043E\u043D\u0441\u043E\u043D \u043F\u0440\u0435\u0434\u043B\u043E\u0436\u0438\u043B \u0438\u0441\u043F\u043E\u043B\u044C\u0437\u043E\u0432\u0430\u0442\u044C \u0434\u043E\u043F\u043E\u043B\u043D\u0438\u0442\u0435\u043B\u044C\u043D\u043E \u0435\u0449\u0451 \u043D\u0435\u0441\u043A\u043E\u043B\u044C\u043A\u043E \u043F\u043E\u043B\u043E\u0441 \u0432 \u0438\u043D\u0444\u0440\u0430\u043A\u0440\u0430\u0441\u043D\u043E\u0439 \u0447\u0430\u0441\u0442\u0438 \u0441\u043F\u0435\u043A\u0442\u0440\u0430 (\u043E\u0442 0,7 \u0434\u043E 10,2 \u043C\u043A\u043C). \u041E\u043D\u0438 \u0431\u044B\u043B\u0438 \u043D\u0430\u0437\u0432\u0430\u043D\u044B R, I, J, H, K, L, M \u0438 N. \u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV \u0438\u043C\u0435\u0435\u0442 \u0440\u044F\u0434 \u043D\u0435\u0434\u043E\u0441\u0442\u0430\u0442\u043A\u043E\u0432. \u041A\u043E\u0440\u043E\u0442\u043A\u043E\u0432\u043E\u043B\u043D\u043E\u0432\u0430\u044F \u043E\u0442\u0441\u0435\u0447\u043A\u0430 \u0444\u0438\u043B\u044C\u0442\u0440\u0430 U \u043E\u043F\u0440\u0435\u0434\u0435\u043B\u044F\u0435\u0442\u0441\u044F \u0433\u043B\u0430\u0432\u043D\u044B\u043C \u043E\u0431\u0440\u0430\u0437\u043E\u043C \u0437\u0435\u043C\u043D\u043E\u0439 \u0430\u0442\u043C\u043E\u0441\u0444\u0435\u0440\u043E\u0439, \u0430 \u043D\u0435 \u0441\u0430\u043C\u0438\u043C \u0444\u0438\u043B\u044C\u0442\u0440\u043E\u043C. \u0422\u0430\u043A\u0438\u043C \u043E\u0431\u0440\u0430\u0437\u043E\u043C, \u043D\u0430\u0431\u043B\u044E\u0434\u0430\u0435\u043C\u044B\u0435 \u0432\u0435\u043B\u0438\u0447\u0438\u043D\u044B \u043C\u043E\u0433\u0443\u0442 \u0438\u0437\u043C\u0435\u043D\u044F\u0442\u044C\u0441\u044F \u0441 \u0432\u044B\u0441\u043E\u0442\u043E\u0439 \u043D\u0430\u0431\u043B\u044E\u0434\u0430\u0442\u0435\u043B\u044C\u043D\u043E\u0433\u043E \u043F\u0443\u043D\u043A\u0442\u0430 \u0438 \u043F\u0435\u0440\u0435\u043C\u0435\u043D\u043E\u0439 \u0430\u0442\u043C\u043E\u0441\u0444\u0435\u0440\u043D\u044B\u0445 \u0443\u0441\u043B\u043E\u0432\u0438\u0439. \u0422\u0435\u043C \u043D\u0435 \u043C\u0435\u043D\u0435\u0435 \u0432 \u044D\u0442\u043E\u0439 \u0441\u0438\u0441\u0442\u0435\u043C\u0435 \u0441\u0434\u0435\u043B\u0430\u043D\u043E \u043E\u0447\u0435\u043D\u044C \u043C\u043D\u043E\u0433\u043E \u0438\u0437\u043C\u0435\u0440\u0435\u043D\u0438\u0439 \u0431\u043B\u0435\u0441\u043A\u0430 \u0437\u0432\u0451\u0437\u0434 (\u043D\u0435 \u0442\u043E\u043B\u044C\u043A\u043E \u044F\u0440\u043A\u0438\u0445, \u043D\u043E \u0438 \u043C\u043D\u043E\u0436\u0435\u0441\u0442\u0432\u0430 \u0441\u043B\u0430\u0431\u044B\u0445)."@ru , "O sistema fotom\u00E9trico UBV, tamb\u00E9m chamado sistema Johnson (ou sistema Johnson-Morgan) \u00E9 um sistema fotom\u00E9trico de banda larga que utiliza um conjunto de tr\u00EAs especiais, designados pelas letras U, B, e V, que filtram a luz de uma estrela, deixando passar apenas bandas espec\u00EDficas do espectro eletromagn\u00E9tico. As bandas s\u00E3o posicionadas na regi\u00E3o do ultravioleta (U), na regi\u00E3o do azul (B), e na regi\u00E3o da luz vis\u00EDvel (V) do espectro luminoso. Desta forma, pode-se medir a magnitude da estrela em cada uma das bandas e determinar os \u00EDndices de cor, B-V e U-B. Os filtros s\u00E3o constru\u00EDdos de tal maneira que os comprimentos de onda m\u00E9dios da banda passante estejam centrados em 364 nm para a banda U, 442 nm para a banda B, e 540 nm para a banda V. A defini\u00E7\u00E3o dos limites da banda B foi feita em fun\u00E7\u00E3o das caracter\u00EDsticas dos filmes fotogr\u00E1ficos usados como detectores nos anos de 1950 quando o sistema UBV foi introduzido pelos astr\u00F4nomos americanos e William Wilson Morgan. Apesar do sistema UBV ter sido o primeiro sistema fotom\u00E9trico padronizado, ele tem algumas desvantagens. Uma delas \u00E9 que o limite inferior de corte (em comprimento de onda) para a banda U depende muito mais da atmosfera terrestre do que do pr\u00F3prio filtro, o que faz com que as magnitudes observadas para a banda ultravioleta variem com a altitude e com as condi\u00E7\u00F5es atmosf\u00E9ricas."@pt , "UBV \uCE21\uAD11\uACC4(UBV photometric system \uB610\uB294 Johnson system \uB610\uB294 Johnson-Morgan system)\uC740 \uB113\uC9C0\uB3C4 \uD769\uC5B4\uC838\uC9C0\uACE0 \uC788\uB294 \uD56D\uC131\uC758 \uBD84\uB958\uBC95\uC73C\uB85C, \uC790\uC678\uC5ED(U:ultraviolet), \uCCAD\uC0C9\uC5ED(B:blue), \uC2E4\uC2DC\uC5ED(V:visual)\uC758 3\uC0C9 \uD544\uD130\uB97C \uAC00\uC9C4 \uCC9C\uCCB4\uC758 \uBC1D\uAE30\uB97C \uCE21\uC815\uD574, \uD56D\uC131\uC758 \uC0C9\uC73C\uB85C \uBD84\uB958\uD558\uB294 \uBC29\uBC95\uC774\uB2E4. \uD45C\uC900\uD654\uB41C \uCD5C\uCD08\uC758 \uC774\uB2E4. 1950\uB144\uB300\uC5D0 \uC544\uBA54\uB9AC\uCE74 \uD569\uC911\uAD6D\uC758 \uCC9C\uBB38\uD559\uC790, \uACFC \uC5D0 \uC758\uD574\uC11C \uB3C4\uC785\uB418\uC5C8\uB2E4. \uD544\uD130\uB294 \uAC01\uAC01 \uD3C9\uADE0 \uD30C\uC7A5\uC774 U\uC5D0\uC11C\uB294 364 nm, B\uB294 442 nm, V\uB294 540 nm\uAC00 \uB418\uB3C4\uB85D \uC120\uD0DD\uB41C\uB2E4. \uC131\uAC04 \uD761\uC218\uC5D0 \uC758\uD55C \uC801\uD654\uC5D0 \uC601\uD5A5\uC744 \uBC1B\uC9C0 \uC54A\uAC8C B-V\uC640 U-B\uC758 \uAC10\uB3C4\uCC28\uC774\uB294 \uAE30\uC900\uC774 \uB418\uB294 AO V\uBCC4\uB85C \uC81C\uB85C\uAC00 \uB418\uB3C4\uB85D \uAD50\uC815\uB41C\uB2E4. UBV \uCE21\uAD11\uACC4\uB294 \uC790\uC678\uC120\uC774 \uD544\uD130 \uBFD0\uB9CC\uC774 \uC544\uB2C8\uB77C, \uC9C0\uAD6C\uC758 \uB300\uAE30\uC5D0 \uC758\uD574\uC11C \uD761\uC218\uB418\uAE30 \uB54C\uBB38\uC5D0, \uB300\uAE30\uC758 \uC0C1\uD669\uC774\uB098 \uAD00\uCE21\uC9C0\uC758 \uB192\uC774\uC5D0 \uC758\uD574\uC11C \uC601\uD5A5\uC744 \uBC1B\uB294\uB2E4\uB294 \uACB0\uC810\uC744 \uAC16\uACE0 \uC788\uC9C0\uB9CC, \uBC1D\uC740 \uD56D\uC131\uC744 \uD3EC\uD568\uD55C \uB9E4\uC6B0 \uB9CE\uC740 \uD56D\uC131\uC774 \uC774 \uBC29\uBC95\uC73C\uB85C \uBD84\uB958\uB418\uC5B4 \uC654\uB2E4."@ko , "Le syst\u00E8me photom\u00E9trique UBV, appel\u00E9 \u00E9galement syst\u00E8me de Johnson (ou syst\u00E8me de Johnson-Morgan), est un syst\u00E8me photom\u00E9trique \u00E0 large bande pour classer les \u00E9toiles selon leurs couleurs. C'est le premier syst\u00E8me photom\u00E9trique photo\u00E9lectrique standardis\u00E9. Les lettres U, B et V correspondent aux magnitudes ultraviolette, bleue et visible (ou verte), qui sont mesur\u00E9es pour une \u00E9toile afin de la classer dans le syst\u00E8me UBV. Le choix des couleurs \u00E0 l'extr\u00E9mit\u00E9 bleue du spectre est li\u00E9 au biais que la pellicule photographique pr\u00E9sente pour ces couleurs. Il fut introduit dans les ann\u00E9es 1950 par les astronomes am\u00E9ricains Harold Lester Johnson et William Wilson Morgan. Les filtres sont choisis de fa\u00E7on que les longueurs d'onde moyennes des bandes spectrales soient de 364 nm pour U, 442 nm pour B et 540 nm pour V. Le point z\u00E9ro des indices de couleur B-V et U-B a \u00E9t\u00E9 d\u00E9fini pour \u00EAtre nul pour les \u00E9toiles de type A0 V non affect\u00E9es par le rougissement interstellaire. V\u00E9ga est l'une des \u00E9toiles qui a servi d'\u00E9talon primaire pour \u00E9talonner ce syst\u00E8me de filtre. Le syst\u00E8me UBV a quelques imperfections. La longueur d'onde de coupure courte du filtre U est d\u00E9finie principalement par l'atmosph\u00E8re terrestre plut\u00F4t que par le filtre lui-m\u00EAme. Donc, cette longueur d'onde (et les magnitudes observ\u00E9es) peuvent varier avec l'altitude et les conditions atmosph\u00E9riques. Cependant un grand nombre de mesures ont \u00E9t\u00E9 faites avec ce syst\u00E8me, dont beaucoup d'\u00E9toiles brillantes."@fr , "UBV syst\u00E9m \u010Di Johnson\u016Fv syst\u00E9m nebo i Johnson\u016Fv-Morgan\u016Fv syst\u00E9m je \u0161irokop\u00E1smov\u00FD pro klasifikaci hv\u011Bzd podle jejich barvy. Je to prvn\u00ED zn\u00E1m\u00FD standardizovan\u00FD fotometrick\u00FD syst\u00E9m. P\u00EDsmena U, B a V znamenaj\u00ED ultrafialov\u00E9, modr\u00E9 (blue) a vizu\u00E1ln\u00ED magnitudy, kter\u00E9 se m\u011B\u0159\u00ED na hv\u011Bzd\u011B pro klasifikaci v tomto syst\u00E9mu. Volba barev je pr\u00E1v\u011B takov\u00E1, proto\u017Ee fotografick\u00FD film je citliv\u00FD na tyto barvy. Syst\u00E9m zavedli v 50. letech 20. stolet\u00ED ameri\u010Dt\u00ED astronomov\u00E9 a . Filtry se vyb\u00EDraj\u00ED takov\u00FDm zp\u016Fsobem, \u017Ee st\u0159edn\u00ED vlnov\u00E9 d\u00E9lky funkc\u00ED citlivosti jsou 364 nm pro U, 442 nm pro B a 540 nm pro V. Nulov\u00FD bod barevn\u00FDch index\u016F B-V a U-B byl definov\u00E1n jako nula pro hv\u011Bzdy A0 V neovlivn\u011Bn\u00E9 . UBV syst\u00E9m m\u00E1 i nev\u00FDhody. Kr\u00E1tk\u00FD rozsah vlnov\u00E9 d\u00E9lky pro filtr U je definov\u00E1n hlavn\u011B zemskou atmosf\u00E9rou, ne\u017E samotnou hv\u011Bzdou. To znamen\u00E1, \u017Ee hodnota t\u00E9to slo\u017Eky jako i pozorovan\u00E1 magnituda se m\u016F\u017Ee m\u011Bnit s nadmo\u0159skou v\u00FD\u0161kou a atmosf\u00E9rick\u00FDmi podm\u00EDnkami. Naproti tomu velk\u00E9 mno\u017Estv\u00ED m\u011B\u0159en\u00ED bylo vykonan\u00FDch pr\u00E1v\u011B t\u00EDmto syst\u00E9mem, v\u010Detn\u011B spousty jasn\u00FDch hv\u011Bzd."@cs , "UBV\u6D4B\u5149\u7CFB\u7EDF\uFF0C\u662F\u4E00\u79CD\u5929\u6587\u5B66\u4E0A\u5E38\u7528\u7684\u4E09\u8272\u5BBD\u5E26\u6D4B\u5149\u7CFB\u7EDF\uFF0C\u662F\u56FD\u9645\u4E0A\u7684\u6807\u51C6\u6D4B\u5149\u7CFB\u7EDF\u3002UBV\u6D4B\u5149\u7CFB\u7EDF\u662F1950\u5E74\u4EE3\u7531\u7F8E\u56FD\u5929\u6587\u5B66\u5BB6\u7EA6\u7FF0\u900A\u548C\u6469\u6839\uFF08W.W.Morgen\uFF09\u4F7F\u7528\u9EA6\u514B\u5510\u7EB3\u5929\u6587\u53F0\u53E3\u5F84\u4E3A33\u5398\u7C73\u548C2.08\u7C73\u7684\u53CD\u5C04\u671B\u8FDC\u955C\uFF0C\u52A0U\u3001B\u3001V\u4E09\u4E2A\u6CE2\u6BB5\u7684\u6EE4\u5149\u7247\u521B\u7ACB\u7684\uFF0C\u56E0\u6B64\u53C8\u79F0\u7EA6\u7FF0\u900A-\u6469\u6839\u7CFB\u7EDF\uFF08Johnson-Morgan system\uFF09\u3002UBV\u6D4B\u5149\u7CFB\u7EDF\u7684\u661F\u7B49\u503C\u5E38\u7528V\u661F\u7B49\u548C\u8272\u6307\u6570B-V\u548CU-B\u8868\u793A\u3002\u4E3A\u786E\u5B9A\u5176\u96F6\u70B9\uFF0C\u9009\u53D6\u4E866\u9897\u5149\u8C31\u985E\u578B\u4E3AA0V\u7684\u6052\u661F\uFF0C\u53D6\u5176\u5E73\u5747\u8272\u6307\u6570\u4E3A\u96F6\u3002 UBV\u6D4B\u5149\u7CFB\u7EDF\u8981\u6C42\u4F7F\u7528RCA 1P21\u578B\u5149\u7535\u500D\u589E\u7BA1\uFF0C\u5176\u4E2DU\u6CE2\u6BB5\u6CE2\u957F\u4E3A360\u7EB3\u7C73\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 9863\u6EE4\u5149\u7247\u6D4B\u5F97\uFF0C\u4E3A\u8FD1\u7D2B\u5916\u7EBF\u6210\u4EFD\uFF0C\u6240\u5F97\u4E3A\u7D2B\u5916\u661F\u7B49\u3002B\u6CE2\u6BB5\u6CE2\u957F\u4E3A440nm\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 5030\u6EE4\u5149\u7247\u52A0\u539A\u5EA6\u4E3A2\u6BEB\u7C73\u7684Schott GG 13\u6D4B\u5F97\uFF0C\u6D4B\u91CF\u84DD\u8272\u6210\u5206\uFF0C\u6240\u5F97\u4E3A\u84DD\u8272\u661F\u7B49\u3002V\u6CE2\u6BB5\u6CE2\u957F\u4E3A550nm\u5DE6\u53F3\uFF0C\u4F7F\u7528\u6807\u51C6\u7684Corning 3384\u6EE4\u5149\u7247\u6D4B\u5F97\uFF0C\u6D4B\u91CF\u9EC4\u3001\u7EFF\u8272\u6210\u5206\uFF0C\u548C\u4EBA\u773C\u6240\u89C1\u4EAE\u5EA6\u63A5\u8FD1\uFF0C\u6240\u5F97\u4E3A\u53EF\u89C1\u661F\u7B49\u3002 \u7C7B\u4F3C\u7684\u6D4B\u5149\u7CFB\u7EDF\u8FD8\u6709\u66F4\u590D\u6742\u7684uvby\u6D4B\u5149\u7CFB\u7EDF\u548CStebbins-Whitford-Kron\u516D\u8272\uFF08UVBRGI\uFF09\u7CFB\u7EDF\u7B49\u3002"@zh , "\u0646\u0638\u0627\u0645 \u0627\u0644\u0642\u064A\u0627\u0633 \u0627\u0644\u0636\u0648\u0626\u064A UBV (\u0641\u0648\u0642 \u0628\u0646\u0641\u0633\u062C\u064A\u060C \u0623\u0632\u0631\u0642\u060C \u0628\u0635\u0631\u064A)\u060C \u064A\u0633\u0645\u0649 \u0623\u064A\u0636\u0627 \u0646\u0638\u0627\u0645 (\u0623\u0648 \u0646\u0638\u0627\u0645 \u062C\u0648\u0646\u0633\u0648\u0646 \u0645\u0648\u0631\u063A\u0627\u0646)\u060C \u0647\u0648 \u0646\u0638\u0627\u0645 \u0642\u064A\u0627\u0633 \u0636\u0648\u0626\u064A \u0639\u0631\u064A\u0636 \u0627\u0644\u0646\u0637\u0627\u0642 \u0644\u062A\u0635\u0646\u064A\u0641 \u0627\u0644\u0646\u062C\u0648\u0645 \u0648\u0641\u0642\u0627 \u0644\u0623\u0644\u0648\u0627\u0646\u0647\u0627. \u0648\u0647\u0648 \u0623\u0648\u0644 \u0646\u0638\u0627\u0645 \u0643\u0647\u0631\u0648\u0636\u0648\u0626\u064A \u0645\u0648\u062D\u062F \u0645\u0639\u0631\u0648\u0641 \u062E\u0627\u0635 \u0628\u0642\u064A\u0627\u0633 \u0627\u0644\u0636\u0648\u0621 . \u0627\u0644\u062D\u0631\u0648\u0641 U\u060C B\u060C \u0648 V \u062A\u062F\u0644 \u0639\u0644\u0649 \u0627\u0644\u0645\u0642\u062F\u0627\u0631 \u0641\u0648\u0642 \u0627\u0644\u0628\u0646\u0641\u0633\u062C\u064A \u0648\u0627\u0644\u0623\u0632\u0631\u0642 \u0648\u0627\u0644\u0628\u0635\u0631\u064A\u060C \u0648\u0627\u0644\u062A\u064A \u064A\u062A\u0645 \u0642\u064A\u0627\u0633\u0647\u0627 \u0644\u0646\u062C\u0645 \u0645\u0646 \u0623\u062C\u0644 \u062A\u0635\u0646\u064A\u0641\u0629 \u0641\u064A \u0646\u0638\u0627\u0645 UBV. \u0627\u062E\u062A\u064A\u0627\u0631 \u0627\u0644\u0623\u0644\u0648\u0627\u0646 \u0639\u0644\u0649 \u0627\u0644\u0637\u0631\u0641 \u0627\u0644\u0623\u0632\u0631\u0642 \u0645\u0646 \u0627\u0644\u0637\u064A\u0641 \u0647\u0648 \u0628\u0633\u0628\u0628 \u062A\u062D\u064A\u0632 \u0627\u0644\u0641\u064A\u0644\u0645 \u0627\u0644\u0641\u0648\u062A\u0648\u063A\u0631\u0627\u0641\u064A \u0644\u062A\u0644\u0643 \u0627\u0644\u0623\u0644\u0648\u0627\u0646. \u0648\u0644\u0642\u062F \u062A\u0645 \u0639\u0631\u0636 \u0627\u0644\u0646\u0638\u0627\u0645 \u0641\u064A \u0627\u0644\u062E\u0645\u0633\u064A\u0646\u0627\u062A \u0645\u0646 \u0642\u0628\u0644 \u0627\u0644\u0641\u0644\u0643\u064A\u064A\u0646 \u0627\u0644\u0623\u0645\u0631\u064A\u0643\u064A\u064A\u0646 \u0647\u0627\u0631\u0648\u0644\u062F \u0644\u064A\u0633\u062A\u0631 \u062C\u0648\u0646\u0633\u0648\u0646 \u0648\u0648\u064A\u0644\u064A\u0627\u0645 \u0648\u064A\u0644\u0633\u0648\u0646 \u0645\u0648\u0631\u063A\u0627\u0646 \u0645\u0633\u062A\u062E\u062F\u0645\u064A\u0646 \u062A\u0644\u064A\u0633\u0643\u0648\u0628 13 \u00AB\u0648 82\u00BB \u0641\u064A \u0645\u0631\u0635\u062F \u0645\u0627\u0643\u062F\u0648\u0646\u0627\u0644\u062F \u0644\u062A\u062D\u062F\u064A\u062F \u0627\u0644\u0646\u0638\u0627\u0645."@ar , "Il sistema fotometrico UBV, detto anche sistema di Johnson (o sistema di Johnson-Morgan), \u00E8 un sistema fotometrico a banda larga per la classificazione delle stelle in base al loro colore. \u00C8 stato tra i primi sistemi fotometrici ad essere standardizzato. Inizialmente concepito per essere utilizzato con fotometri fotoelettrici Philips 1PP21 \u00E8 stato poi lievemente modificato per adattarsi anche ad altri tipi di rivelatori. Le lettere U, B, V indicano magnitudine ultravioletta, blu e visuale, misurate per una stella per poterla classificare in un sistema UBV. La scelta dei colori sulla parte finale verso il blu nello spettro \u00E8 dovuta al fatto che le lastre fotografiche sono meglio impressionate da questi colori. Fu introdotto negli anni cinquanta dagli astronomi statunitensi e William Wilson Morgan. I filtri sono selezionati in maniera tale da avere lunghezze d'onda medie pari a 364 nm per U, 442 nm per B e 540 nm per V. Il valore zero delle scale B-V e U-B \u00E8 assunto dalle stelle di classe spettrale A0, che appaiono di colore bianco. Il sistema UBV presenta alcuni svantaggi. La corta lunghezza d'onda di taglio del filtro U \u00E8 dovuta principalmente all'assorbimento introdotto dall'atmosfera terrestre pi\u00F9 che dal filtro stesso; come conseguenza si ha che esso (e le magnitudini osservate) possono variare con l'altitudine e con le condizioni atmosferiche. In ogni caso molte misure vengono effettuate in questo sistema (ad esempio quelle di gran parte delle stelle luminose)."@it , "Das UBV-System ist ein breitbandiges fotometrisches System, mit dem zahlreiche Sterne vermessen wurden. Es wird auch Johnson- oder Johnson-Morgan-System genannt nach den Astronomen Harold Lester Johnson und William Wilson Morgan, die es in den 1950er Jahren einf\u00FChrten."@de , "\u30B8\u30E7\u30F3\u30BD\u30F3\u306E UBV \u30B7\u30B9\u30C6\u30E0\u3001\u307E\u305F\u306F\u30B8\u30E7\u30F3\u30BD\u30F3\u30FB\u30E2\u30FC\u30AC\u30F3\u30FB\u30B7\u30B9\u30C6\u30E0 \uFF08UBV photometric system\u307E\u305F\u306FJohnson system\u307E\u305F\u306FJohnson-Morgan system\uFF09\u306F\u5E83\u304F\u7528\u3044\u3089\u308C\u3066\u3044\u308B\u6052\u661F\u306E\u3067\u3001\u7D2B\u5916\u57DF\uFF08U:ultraviolet\uFF09\u3001\u9752\u8272\u57DF\uFF08B:blue\uFF09\u3001\u5B9F\u8996\u57DF\uFF08V:visual\uFF09\u306E3\u8272\u306E\u30D5\u30A3\u30EB\u30BF\u30FC\u3068\u691C\u51FA\u5668\u3068\u3057\u3066RCA\u88FD1P21\u5149\u96FB\u5B50\u5897\u500D\u7BA1\u306E\u7D44\u3092\u3082\u3061\u3044\u3066\u5929\u4F53\u306E\u660E\u308B\u3055\u3092\u6E2C\u5B9A\u3057\u305F\u6A19\u6E96\u661F\u30AB\u30BF\u30ED\u30B0\u3067\u5B9A\u7FA9\u3057\u305F\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u3067\u3042\u308B\u30021950\u5E74\u4EE3\u306B\u30A2\u30E1\u30EA\u30AB\u5408\u8846\u56FD\u306E\u5929\u6587\u5B66\u8005\u3001\u30CF\u30ED\u30EB\u30C9\u30FB\u30EC\u30B9\u30BF\u30FC\u30FB\u30B8\u30E7\u30F3\u30BD\u30F3\u3068\u30A6\u30A3\u30EA\u30A2\u30E0\u30FB\u30A6\u30A3\u30EB\u30BD\u30F3\u30FB\u30E2\u30FC\u30AC\u30F3\u306B\u3088\u3063\u3066\u5C0E\u5165\u3055\u308C\u305F\u3002 \u30D5\u30A3\u30EB\u30BF\u30FC\u306F\u3001\u691C\u51FA\u5668\u3068\u7D44\u307F\u5408\u308F\u305B\u305F\u969B\u306B\u3001\u30B8\u30E7\u30F3\u30BD\u30F3\u306E\u30AA\u30EA\u30B8\u30CA\u30EB\u306EUBV\u306E\u5206\u5149\u7279\u6027\u306B\u3067\u304D\u308B\u3060\u3051\u4F1A\u3046\u3088\u3046\u306B\u9078\u3070\u308C\u308B\u3002\u305D\u308C\u305E\u308C\u5E73\u5747\u6CE2\u9577\u304CU\u3067\u306F 364 nm\u3001B\u306F 442 nm\u3001V\u306F 540 nm\u3067\u3042\u308B\u304C\u3001\u5358\u306B\u5E73\u5747\u6CE2\u9577\u304C\u5408\u3063\u3066\u3044\u308C\u3070\u3088\u3044\u3068\u3044\u3046\u3082\u306E\u3067\u306F\u306A\u3044\u3002 UBV \u30B7\u30B9\u30C6\u30E0\u306F\u3001\u305F\u3068\u3048\u540C\u4E00\u306E\u7A2E\u985E\u306E\u30D5\u30A3\u30EB\u30BF\u30FC\u3092\u7528\u3044\u305F\u3068\u3068\u3057\u3066\u3082\u3001\u7D44\u307F\u5408\u308F\u305B\u308B\u691C\u51FA\u5668\u3084\u671B\u9060\u93E1\u306E\u5206\u5149\u7279\u6027\u3084\u5730\u7403\u306E\u5927\u6C17\u306B\u3088\u308B\u5438\u53CE\u306A\u3069\u306B\u3088\u308A\u5F71\u97FF\u3055\u308C\u308B\u305F\u3081\u30010.01\u7B49\u7D1A\u306E\u6E2C\u5149\u7CBE\u5EA6\u3092\u8FFD\u6C42\u3059\u308B\u3068\u500B\u3005\u306E\u89B3\u6E2C\u6240\u3054\u3068\u306B\u56FA\u6709\u306E\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u3092\u6301\u3064\u3053\u3068\u306B\u306A\u308B\uFF08\u3053\u308C\u3092\u81EA\u7136\u30B7\u30B9\u30C6\u30E0 natural system \u3068\u3044\u3044\u3001\u305D\u306E\u5668\u68B0\u3067\u6E2C\u5B9A\u3057\u305F\u7B49\u7D1A\u3092\u5668\u68B0\u7B49\u7D1Ainstrumental magnitude\u3068\u3044\u3046\uFF09\u3002\u305D\u3053\u3067\u5168\u5929\u306B\u914D\u7F6E\u3057\u305F\u6E2C\u5149\u6A19\u6E96\u661F\u3092\u500B\u3005\u306E\u30B7\u30B9\u30C6\u30E0\u3067\u6E2C\u5149\u3059\u308B\u3053\u3068\u306B\u3088\u308A\u3001\u6A19\u6E96\u30B7\u30B9\u30C6\u30E0\u306B\u5909\u63DB\u3059\u308B\u3053\u3068\u306B\u3088\u308A\u6A19\u6E96UBV\u30B7\u30B9\u30C6\u30E0\u3067\u306E\u7B49\u7D1A\u306B\u5909\u63DB\u3059\u308B\u3002\u3053\u3046\u3057\u3066\u3001\u660E\u308B\u3044\u6052\u661F\u3092\u542B\u3080\u975E\u5E38\u306B\u591A\u304F\u306E\u6052\u661F\u304C\u3053\u306EUBV\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u306B\u3088\u308A\u6E2C\u5B9A\u3055\u308C\u3066\u304D\u305F\u3002 UBV\u30B7\u30B9\u30C6\u30E0\u306E\u6A19\u6E96\u661F\u306F\u5F53\u521D\u5317\u5929\u306B\u3057\u304B\u8A2D\u5B9A\u3055\u308C\u3066\u304A\u3089\u305A\u3001\u5357\u534A\u7403\u306E\u5929\u6587\u53F0\u3067\u306F\u5317\u534A\u7403\u306E\u89B3\u6E2C\u3068\u306E\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u306E\u53B3\u5BC6\u306A\u4E00\u8CAB\u6027\u3092\u4FDD\u6301\u3067\u304D\u306A\u3044\u3068\u3044\u3046\u554F\u984C\u304C\u3042\u3063\u305F\u3002\u3053\u306E\u3088\u3046\u306A\u72B6\u6CC1\u3092\u80CC\u666F\u306B1971\u5E74\u306E\u56FD\u969B\u5929\u6587\u5B66\u9023\u5408\u306E\u4F1A\u5408\u3067\u3001\u5357\u5317\u3069\u3061\u3089\u306E\u534A\u7403\u304B\u3089\u3082\u89B3\u6E2C\u304C\u53EF\u80FD\u306A\u8D64\u7DEF\u5E2F\u306B\u6A19\u6E96\u661F\u3092\u8A2D\u5B9A\u3059\u308B\u3053\u3068\u304C\u6C7A\u5B9A\u3057\u3001\u8D64\u7DEF\u00B120\u5EA6\u306E\u9818\u57DF\u306B\u591A\u304F\u306E\u6A19\u6E96\u661F\u304C\u8A2D\u5B9A\u3055\u308C\u3066UBV\u7B49\u7D1A\u304C\u6E2C\u5B9A\u3055\u308C\u305F\u30021970\u5E74\u4EE3\u4EE5\u964D\u306F\u3053\u306E\u4F4E\u8D64\u7DEF\u5E2F\u306E\u6A19\u6E96\u661F\u3092\u8DB3\u639B\u304B\u308A\u306B\u5357\u534A\u7403\u306B\u3082UBV\u30B7\u30B9\u30C6\u30E0\u306E\u6A19\u6E96\u661F\u304C\u62E1\u5F35\u3055\u308C\u3066\u3044\u304D\u3001\u5168\u5929\u3092\u30AB\u30D0\u30FC\u3059\u308B\u6E2C\u5149\u30B7\u30B9\u30C6\u30E0\u3068\u306A\u3063\u305F\u3002"@ja , "\u0421\u0438\u0441\u0442\u0435\u043C\u0430 UBV (\u0430\u0431\u043E \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0414\u0436\u043E\u043D\u0441\u043E\u043D\u0430) \u2014 \u0448\u0438\u0440\u043E\u043A\u043E\u0441\u043C\u0443\u0433\u043E\u0432\u0430 \u0444\u043E\u0442\u043E\u043C\u0435\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430 \u0434\u043B\u044F \u043A\u043B\u0430\u0441\u0438\u0444\u0456\u043A\u0430\u0446\u0456\u0457 \u0437\u0456\u0440 \u0437\u0430 \u043A\u043E\u043B\u044C\u043E\u0440\u043E\u043C. \u0412\u0456\u0434\u043E\u043C\u0430 \u044F\u043A \u043F\u0435\u0440\u0448\u0430 \u0441\u0442\u0430\u043D\u0434\u0430\u0440\u0442\u0438\u0437\u043E\u0432\u0430\u043D\u0430 \u0444\u043E\u0442\u043E\u0435\u043B\u0435\u043A\u0442\u0440\u0438\u0447\u043D\u0430 \u0441\u0438\u0441\u0442\u0435\u043C\u0430."@uk , "El Sistema fotom\u00E9trico UBV , tambi\u00E9n conocido como Sistema de Harold Johnson (o sistema de Johnson-Morgan), es un sistema fotom\u00E9trico de banda ancha para la clasificaci\u00F3n estelar regido en funci\u00F3n del color del astro. Es el primer sistema fotom\u00E9trico estandarizado. Las letras U, B y V indican respectivamente Ultravioleta, azul y espectro visible, las cuales son medidas para clasificar a una estrella en el sistema UBV.\u200B La elecci\u00F3n de colores pertenecientes al extremo azul del espectro se debe a la tendencia que tiene el papel fotogr\u00E1fico a captar estos colores. Fue introducido en 1950 por el astr\u00F3nomo americano Harold Lester Johnson y William Wilson Morgan. Los filtros son seleccionados de tal modo que la longitud de onda principal que responda a ellos sea 364 nm para U, 442 nm para B, 540 para V.El punto cero de y U-B \u00EDndice de color fue definido para ser cero para que las estrellas A0 V no se vieran afectadas por el Enrojecimiento interestelar (fen\u00F3meno asociado a la extinci\u00F3n estelar). El sistema UBV tiene ciertas desventajas. La corta longitud de onda del filtro U est\u00E1 m\u00E1s definida por la atm\u00F3sfera terrestre que por el filtro en s\u00ED mismo. Debido a esto (y a las magnitudes observadas) puede variar con la altitud, y las condiciones atmosf\u00E9ricas. Sin embargo, son muchas las medidas que se han tomado mediante este sistema de cuantificaci\u00F3n.\u200B En Fotometr\u00EDa, parte del espectro electromagn\u00E9tico filtrada por el filtro V Johnson, de color verde: el pico de transmisi\u00F3n est\u00E1 situado hacia los 550 nan\u00F3metros (color verde). Corresponde de modo muy aproximado a la m\u00E1xima sensibilidad del ojo humano; fotom\u00E9tricamente es muy similar a la magnitud fotovisual (mpv) de los antiguos fotometros fotoel\u00E9ctricos, en contraposici\u00F3n a la magnitud fotogr\u00E1fica (mpg) de las placas fotogr\u00E1ficas, mucho m\u00E1s sensibles a la luz de onda corta (violeta y azul). Dentro del sistema fotom\u00E9trico UBV, o de Johnson, la Banda V es la que posee de mayor longitud de onda de las tres originales: U (ultravioleta), B (azul, Banda B) y V (verde o visual). En el sistema UBVRI, la Banda V corresponde a una zona intermedia del espectro m\u00E1s corta que los filtros R (rojo) e I (infrarrojo). Es muy usual en Astronom\u00EDa utilizar el denominado \u00EDndice de color B-V, que no es m\u00E1s que la diferencia entre la magnitud obtenida por el filtro B y la obtenida por el V: con este valor puede determinarse de modo muy aproximado la temperatura superficial de las estrellas y el tipo espectral al que corresponde."@es , "The UBV photometric system (from Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually employed for classifying stars according to their colors. It was the first standardized photometric system. The apparent magnitudes of stars in the system are often used to determine the color indices B-V and U-B, the difference between the B and V magnitudes and the U and B magnitudes respectively. The choice of colors on the blue end of the spectrum was assisted by the bias that photographic film has for those colors. It was introduced in the 1950s by American astronomers Harold Lester Johnson and William Wilson Morgan. A 13 in (330 mm) telescope and the 82 in (2,100 mm) telescope at McDonald Observatory were used to define the system. The filters are selected so that the mean wavelengths of response functions (at which magnitudes are measured to mean precision) are 364 nm for U, 442 nm for B, 540 nm for V. Zero points were calibrated in the B\u2212V (B minus V) and U\u2212B (U minus B) color indices selecting such A0 main sequence stars which are not affected by interstellar reddening. These stars correspond with a mean effective temperature (Teff (K)) of between 9727 and 9790 Kelvin, the latter being stars with class A0V (V meaning five). The system has a key limit drawback. The short wavelength cutoff that is the shortest limit of the U filter is set by any given terrestrial atmosphere rather than the filter itself; thus, it (and observed magnitudes) varies chiefly with altitude and atmospheric water (humidity plus condensation into clouds). However, many measurements have been made in this system, including thousands of the bright stars."@en , "El sistema fotom\u00E8tric UBV, tamb\u00E9 conegut com a sistema Johnson (o sistema Johnson-Morgan), \u00E9s un sistema fotom\u00E8tric de banda ampla per classificar estels segons el seu color. Es tracta del primer sistema fotom\u00E8tric fotoel\u00E8ctric estandarditzat. Les lletres U, B, i V fan refer\u00E8ncia a l'ultraviolat, el blau, i a magnitud visual. L'elecci\u00F3 dels colors a l'extrem del blau de l'espectre \u00E9s a causa de la tend\u00E8ncia que t\u00E9 la pel\u00B7l\u00EDcula fotogr\u00E0fica per aquests colors. Fou introdu\u00EFt el 1950 pels astr\u00F2noms americans Harold Johnson i William Wilson Morgan. Els filtres se seleccionen de tal manera que les longituds d'ona mitjanes de les funcions de resposta s\u00F3n 364 nm per U, 442 nm per B, 540 nm per V.El punt zero del B-V i l'\u00EDndex de color U-B fou definit com a zero per estels A0 V no afectats per enrogiment interestel\u00B7lar. El sistema UBV presenta alguns desavantatges. La longitud d'ona curta de tall curta del filtre U est\u00E0 definida principalment per l'atmosfera terrestre m\u00E9s que pel mateix filtre. Per tant, pot variar amb l'altitud i les condicions atmosf\u00E8riques. Aix\u00F2 no obstant, s'han realitzat un gran nombre de mesures en aquest sistema, incloent-hi molts dels estels brillants."@ca . @prefix gold: . dbr:UBV_photometric_system gold:hypernym dbr:System . @prefix prov: . dbr:UBV_photometric_system prov:wasDerivedFrom . @prefix xsd: . dbr:UBV_photometric_system dbo:wikiPageLength "4603"^^xsd:nonNegativeInteger . @prefix wikipedia-en: . dbr:UBV_photometric_system foaf:isPrimaryTopicOf wikipedia-en:UBV_photometric_system .