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HD 91312 is a multiple star system in the northern circumpolar constellation Ursa Major. Faintly visible to the naked eye, it is the brightest star of Ursa Major without Flamsteed designation with a combined apparent visual magnitude of 4.72. The system is located at a distance of 109 light-years from the Sun based on parallax. The radial velocity is poorly constrained, but it appears to be drifting further away at a rate of ~9 km/s.

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  • HD 91312 (en)
  • HD 91312 (sv)
  • HD 91312 (zh)
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  • HD 91312 är en trippelstjärna belägen i den mellersta delen av stjärnbilden Stora björnen. Den har en kombinerad skenbar magnitud av ca 4,72 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 29,8 mas, beräknas den befinna sig på ett avstånd på ca 109 ljusår (ca 34 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 9 km/s. (sv)
  • HD 91312,又名BD+41 2101,SAO 43379、HR 4132,是一颗恒星,视星等为4.75,位于銀經178.93,銀緯58.62,其B1900.0坐标为赤經10h 27m 23.9s,赤緯+40° 58.62′ 25″。 (zh)
  • HD 91312 is a multiple star system in the northern circumpolar constellation Ursa Major. Faintly visible to the naked eye, it is the brightest star of Ursa Major without Flamsteed designation with a combined apparent visual magnitude of 4.72. The system is located at a distance of 109 light-years from the Sun based on parallax. The radial velocity is poorly constrained, but it appears to be drifting further away at a rate of ~9 km/s. (en)
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absmag v
age myr
  • ~200 (en)
appmag v
class
  • A7IV-V + M (en)
component
  • A (en)
  • B (en)
constell
eccentricity
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