About: 13 Boötis

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13 Boötis is a solitary variable star in the northern constellation of Boötes, and is positioned near the western constellation border with Ursa Major. It has the variable star designation CF Boötis, often abbreviated CF Boo, while 13 Boötis is the star's Flamsteed designation. This star has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 5.26. It is located at a distance of approximately 700 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −14 km/s.

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  • 13 Boötis is a solitary variable star in the northern constellation of Boötes, and is positioned near the western constellation border with Ursa Major. It has the variable star designation CF Boötis, often abbreviated CF Boo, while 13 Boötis is the star's Flamsteed designation. This star has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 5.26. It is located at a distance of approximately 700 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −14 km/s. This is an aging red giant star on the asymptotic giant branch with a stellar classification of M1.5III, which is interpreted by stellar evolutionary models to mean it has exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. It is classified as a slow irregular variable of the Lb type, and its brightness has been observed to vary from +5.29 down to +5.38. The star has ~74 times the girth of the Sun and is radiating 1,114 times the Sun's luminosity from its swollen photosphere at an effective temperature of 3,889 K. There is a magnitude 11.05 visual companion located at an angular separation of 76.40 arcseconds from the brighter star, along a position angle of 270°. This was first reported by William Herschel in 1783. (en)
  • 13 Boötis, o CF Boötis nella nomenclatura delle stelle variabili, è una stella gigante rossa di magnitudine 5,27 situata nella costellazione di Boote. Dista 557 anni luce dal sistema solare. (it)
  • 13 Волопаса (лат. 13 Boötis), CF Волопаса (лат. CF Boötis), HD 123782 — тройная звезда в созвездии Волопаса на расстоянии приблизительно 699 световых лет (около 214 парсеков) от Солнца. (ru)
  • 13 Bootis, som är stjärnans Flamsteed-beteckning, eller variabelbeteckningen CF Bootis, är en ensam stjärna i den nordvästra delen av stjärnbilden Björnvaktaren. Den har en genomsnittlig skenbar magnitud på ca 5,26 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 5,9 mas, beräknas den befinna sig på ett avstånd på ca 550 ljusår (ca 168 parsek) från solen. Stjärnan rör sig närmare solen med en heliocentrisk radiell hastighet av ca -14 km/s. (sv)
  • 牧夫座13,又名BD+50 2047,HD 123782、SAO 44905、HR 5300,是牧夫座的一颗恒星,视星等为5.25,位于銀經94.58,銀緯63.23,其B1900.0坐标为赤經14h 4m 33.1s,赤緯+49° 63.23′ 50″。 (zh)
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  • −0.87 (en)
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  • 5.260000 (xsd:double)
  • (en)
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  • M1.5III (en)
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  • 30 (xsd:integer)
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  • 0.210000 (xsd:double)
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  • J2000 (en)
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  • 0.800000 (xsd:double)
  • ≥30 (en)
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  • 0.175600 (xsd:double)
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  • 4.663500 (xsd:double)
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  • 494 (xsd:integer)
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  • 59.801000 (xsd:double)
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  • −58.584 (en)
dbp:semimajor
  • ≥1.25 (en)
dbp:uB
  • +1.92 (en)
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  • 13 Boötis, o CF Boötis nella nomenclatura delle stelle variabili, è una stella gigante rossa di magnitudine 5,27 situata nella costellazione di Boote. Dista 557 anni luce dal sistema solare. (it)
  • 13 Волопаса (лат. 13 Boötis), CF Волопаса (лат. CF Boötis), HD 123782 — тройная звезда в созвездии Волопаса на расстоянии приблизительно 699 световых лет (около 214 парсеков) от Солнца. (ru)
  • 13 Bootis, som är stjärnans Flamsteed-beteckning, eller variabelbeteckningen CF Bootis, är en ensam stjärna i den nordvästra delen av stjärnbilden Björnvaktaren. Den har en genomsnittlig skenbar magnitud på ca 5,26 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 5,9 mas, beräknas den befinna sig på ett avstånd på ca 550 ljusår (ca 168 parsek) från solen. Stjärnan rör sig närmare solen med en heliocentrisk radiell hastighet av ca -14 km/s. (sv)
  • 牧夫座13,又名BD+50 2047,HD 123782、SAO 44905、HR 5300,是牧夫座的一颗恒星,视星等为5.25,位于銀經94.58,銀緯63.23,其B1900.0坐标为赤經14h 4m 33.1s,赤緯+49° 63.23′ 50″。 (zh)
  • 13 Boötis is a solitary variable star in the northern constellation of Boötes, and is positioned near the western constellation border with Ursa Major. It has the variable star designation CF Boötis, often abbreviated CF Boo, while 13 Boötis is the star's Flamsteed designation. This star has a reddish hue and is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 5.26. It is located at a distance of approximately 700 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −14 km/s. (en)
rdfs:label
  • 13 Boötis (en)
  • 13 Boötis (it)
  • 13 Волопаса (ru)
  • 13 Bootis (sv)
  • 天槍增一 (zh)
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