About: HD 203857

An Entity of Type: star, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

HD 203857 is a double star in the constellation Cygnus. It is near the lower limit of visibility to the naked eye, having a combined apparent visual magnitude of 6.46. The distance to the primary component is approsimatly 1,230 light years based on parallax, and it has an absolute magnitude of −0.75. The star is drifting closer to the Sun with a radial velocity of −6.3 km/s. It has a stellar classification of K5 and is known to be evolved. The star likely hosts an extrasolar planet, though yet unconfirmed.

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  • HD 203857 is a double star in the constellation Cygnus. It is near the lower limit of visibility to the naked eye, having a combined apparent visual magnitude of 6.46. The distance to the primary component is approsimatly 1,230 light years based on parallax, and it has an absolute magnitude of −0.75. The star is drifting closer to the Sun with a radial velocity of −6.3 km/s. It has a stellar classification of K5 and is known to be evolved. The star likely hosts an extrasolar planet, though yet unconfirmed. HD 203857 is listed in the Washington Double Star Catalogue as having five visual companions. It is separated by six arc-minutes from , an F-type subgiant, though it is likely they are actually not gravitationally–bound. HD 203784 is thought to be closer to us and less luminous than HD 203857. There are also fainter stars at 23″ and 178″. HD 203784 has a 13th-magnitude star and a 14th-magnitude star within 20″. (en)
  • HD 203857 är en dubbelstjärna belägen i den mellersta delen av stjärnbilden Svanen. Den har en skenbar magnitud av ca 6,46 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 2,7 mas, beräknas den befinna sig på ett avstånd på ca 1 230 ljusår (ca 376 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -6 km/s. (sv)
  • HD 203857，又名BD+36 4543，SAO 71280、HR 8193，是一颗恒星，视星等为6.47，位于銀經83.6，銀緯-9.2，其B1900.0坐标为赤經21h 19m 45.5s，赤緯+36° -9.2′ 21″。 (zh)
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  • −0.75 (en)
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  • 6.460000 (xsd:double)
dbp:class
  • K5 (en)
dbp:constell
dbp:eccentricity
  • 0.300000 (xsd:double)
dbp:epoch
dbp:exoplanet
  • b (en)
dbp:luminosity
  • 513 (xsd:integer)
dbp:mass
  • 1.700000 (xsd:double)
  • ≥8.1 (en)
dbp:pError
  • 0.041700 (xsd:double)
dbp:parallax
  • 2.660100 (xsd:double)
dbp:period
  • 836.800000 (xsd:double)
dbp:propMoDec
  • −8.364 (en)
dbp:propMoRa
  • −5.999 (en)
dbp:radius
  • 46 (xsd:integer)
dbp:semimajor
  • 2.100000 (xsd:double)
dbp:temperature
  • 4080 (xsd:integer)
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  • HD 203857 är en dubbelstjärna belägen i den mellersta delen av stjärnbilden Svanen. Den har en skenbar magnitud av ca 6,46 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 2,7 mas, beräknas den befinna sig på ett avstånd på ca 1 230 ljusår (ca 376 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -6 km/s. (sv)
  • HD 203857，又名BD+36 4543，SAO 71280、HR 8193，是一颗恒星，视星等为6.47，位于銀經83.6，銀緯-9.2，其B1900.0坐标为赤經21h 19m 45.5s，赤緯+36° -9.2′ 21″。 (zh)
  • HD 203857 is a double star in the constellation Cygnus. It is near the lower limit of visibility to the naked eye, having a combined apparent visual magnitude of 6.46. The distance to the primary component is approsimatly 1,230 light years based on parallax, and it has an absolute magnitude of −0.75. The star is drifting closer to the Sun with a radial velocity of −6.3 km/s. It has a stellar classification of K5 and is known to be evolved. The star likely hosts an extrasolar planet, though yet unconfirmed. (en)
rdfs:label
  • HD 203857 (en)
  • HD 203857 (sv)
  • HD 203857 (zh)
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