About: 30 Ophiuchi

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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 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". This is an aging giant star with a stellar classification of K4III, having exhausted the supply of hydrogen at its core and expanded to 36 times the Sun's radius. It is a suspected variable star. The star is radiating 300 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,009 K. It is emitting a far infrared excess due to circumstellar dust, which extends out to a diameter of 240 AU and has a mass of 62×1025 g. 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)
  • 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)
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  • −0.65 (en)
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  • 4.820000 (xsd:double)
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  • +1.48 (en)
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  • K4III (en)
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  • J2000 (en)
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  • 1.730000 (xsd:double)
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  • −0.03 (en)
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  • 0.167600 (xsd:double)
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  • 9.313800 (xsd:double)
dbp:propMoDec
  • −78.09 (en)
dbp:propMoRa
  • −39.13 (en)
dbp:radialV
  • −6.70 (en)
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dbp:uB
  • +1.80 (en)
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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)
rdfs:label
  • 30 Ophiuchi (en)
  • 30 Ophiuchi (sv)
  • 車肆增二 (zh)
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