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30 Ophiuchi is a single star in the equatorial constellation of Ophiuchus, and figures 0.99° east (specifically E½S) of the heart of cluster Messier 10. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.82. The distance to this star is approximately 350 light years based on parallax. Its present motion is, net, one of approaching rather than parting, at −6.7 km/s, its "radial velocity". The primary presents with two visual companions: B, at magnitude 9.71 and separation 99.8″, and C, at magnitude 8.75 and separation 220.9″ (3′ 40.9″).

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  • 30 Ophiuchi (en)
  • 30 Ophiuchi (sv)
  • 車肆增二 (zh)
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  • 30 Ophiuchi, som är stjärnans Flamsteed-beteckning är en ensam stjärna i den mellersta delen av stjärnbilden Ormbäraren, belägen 1° ostsydost om Messier 10. Den har en skenbar magnitud på ca 4,82 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 9,3 mas, beräknas den befinna sig på ett avstånd på ca 350 ljusår (ca 107 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca –6,7 km/s. (sv)
  • 蛇夫座30,又名BD-04 4215,HD 153687、SAO 141483、HR 6318,是蛇夫座的一颗恒星,视星等为4.82,位于銀經15.58,銀緯22.18,其B1900.0坐标为赤經16h 55m 47.1s,赤緯-4° 22.18′ 22″。 (zh)
  • 30 Ophiuchi is a single star in the equatorial constellation of Ophiuchus, and figures 0.99° east (specifically E½S) of the heart of cluster Messier 10. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.82. The distance to this star is approximately 350 light years based on parallax. Its present motion is, net, one of approaching rather than parting, at −6.7 km/s, its "radial velocity". The primary presents with two visual companions: B, at magnitude 9.71 and separation 99.8″, and C, at magnitude 8.75 and separation 220.9″ (3′ 40.9″). (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Ophiuchus_constellation_map.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Red_circle.svg
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absmag v
  • −0.65 (en)
appmag v
b-v
  • +1.48 (en)
class
  • K4III (en)
constell
epoch
  • J2000 (en)
gravity
metal fe
  • −0.03 (en)
p error
parallax
prop mo dec
  • −78.09 (en)
prop mo ra
  • −39.13 (en)
radial v
  • −6.70 (en)
rotational velocity
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