About: 2 Scorpii

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2 Scorpii (A Scorpii) is a double star in the southern zodiac constellation of Scorpius. The brighter component has an apparent visual magnitude of 4.69, which is bright enough to be visible to the naked eye, while the fainter star is of magnitude 6.98. The distance to this pair can be estimated from the annual parallax shift of 6.49±0.51 mas, which places it roughly 500 light years away. It has a peculiar velocity of 16.5±2.4 km/s and is moving closer to the Sun with a heliocentric radial velocity of about −9 km/s, which will bring it to a perihelion distance of 450 ly (139 pc) in about 2.9 million years. This is a probable (73% chance) member of the Lower Centaurus–Crux group of the nearby Scorpius–Centaurus association (Sco OB2), or else (27% chance) it is a member of the Gould's Belt.

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  • 2 Scorpii (A Scorpii) is a double star in the southern zodiac constellation of Scorpius. The brighter component has an apparent visual magnitude of 4.69, which is bright enough to be visible to the naked eye, while the fainter star is of magnitude 6.98. The distance to this pair can be estimated from the annual parallax shift of 6.49±0.51 mas, which places it roughly 500 light years away. It has a peculiar velocity of 16.5±2.4 km/s and is moving closer to the Sun with a heliocentric radial velocity of about −9 km/s, which will bring it to a perihelion distance of 450 ly (139 pc) in about 2.9 million years. This is a probable (73% chance) member of the Lower Centaurus–Crux group of the nearby Scorpius–Centaurus association (Sco OB2), or else (27% chance) it is a member of the Gould's Belt. With high likelihood (>95%), this is a binary star system. As of 2014, the pair had an angular separation of 2.061″±0.001″ along a position angle of 268.28°±0.02°. The brighter member, component A, is a B-type main-sequence star with a stellar classification of B2.5 Vn. The 'n' suffix indicates broad (nebulous) absorption lines due to rapid rotation. It is spinning with a projected rotational velocity of 320 km/s, giving the star an oblate shape with an equatorial bulge that is 15% larger than the polar radius. Roughly 30 million years old, it has an estimated 6.9 times the mass of the Sun and is radiating 457 times the Sun's luminosity from its photosphere at an effective temperature of 20,350 K. (en)
  • A Scorpii 2 Scorpii Autres désignations A Sco, 2 Sco (Flamsteed), HR 5904, HD 142114, HIP 77840, CD-24 12352, CPD-24 5582, SAO 183896, WDS J15536 -2520 2 Scorpii (en abrégé 2 Sco) est une étoile double de la constellation zodiacale du Scorpion. Elle porte également la désignation de Bayer de A Scorpii. Sa composante la plus brillante brille d'une magnitude apparente de 4,69, ce qui la rend visible à l'œil nu, tandis que son compagnon est d'une magnitude de 6,98. (fr)
  • 2 Scorpii (A Scorpii) é uma estrela na direção da Scorpius. Possui uma ascensão reta de 15h 53m 36.73s e uma declinação de −25° 19′ 37.5″. Sua magnitude aparente é igual a 4.59. Considerando sua distância de 434 anos-luz em relação à Terra, sua magnitude absoluta é igual a −1.03. Pertence à classe espectral B2.5Vn. (pt)
  • 2 Scorpii, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna, belägen i den mellersta delen av stjärnbilden Skorpionen och har även Bayer-beteckningen A Scorpii. Den har en skenbar magnitud av ca 4,69 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 6,5 mas, beräknas den befinna sig på ett avstånd på ca 500 ljusår (ca 150 parsek) från solen. Den har en egenrörelse på 16,5 ± 2,4 km/s och rör sig närmare solen med en heliocentrisk radialhastighet på ca −9 km/s, vilket kommer att föra den till ett perihelionsavstånd på 450 ljusår om ca 2,9 miljoner år. Den ingår med en sannolikhet på 73 procent i gruppen Lower Centaurus Crux i den närliggande Scorpius-Centaurus-föreningen (Sco OB2), eller annars (27 procent sannolikhet) igår den i Gould's Belt. (sv)
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  • −1.33 (en)
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  • 4.690000 (xsd:double)
  • (en)
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  • −0.11/+0.07 (en)
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  • B2.5 Vn (en)
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  • 2 (xsd:integer)
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dbp:epoch
  • J2000 (en)
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  • 457.400000 (xsd:double)
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  • 0.510000 (xsd:double)
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  • 6.490000 (xsd:double)
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  • −25.18 (en)
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  • −15.12 (en)
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  • A Scorpii 2 Scorpii Autres désignations A Sco, 2 Sco (Flamsteed), HR 5904, HD 142114, HIP 77840, CD-24 12352, CPD-24 5582, SAO 183896, WDS J15536 -2520 2 Scorpii (en abrégé 2 Sco) est une étoile double de la constellation zodiacale du Scorpion. Elle porte également la désignation de Bayer de A Scorpii. Sa composante la plus brillante brille d'une magnitude apparente de 4,69, ce qui la rend visible à l'œil nu, tandis que son compagnon est d'une magnitude de 6,98. (fr)
  • 2 Scorpii (A Scorpii) é uma estrela na direção da Scorpius. Possui uma ascensão reta de 15h 53m 36.73s e uma declinação de −25° 19′ 37.5″. Sua magnitude aparente é igual a 4.59. Considerando sua distância de 434 anos-luz em relação à Terra, sua magnitude absoluta é igual a −1.03. Pertence à classe espectral B2.5Vn. (pt)
  • 2 Scorpii (A Scorpii) is a double star in the southern zodiac constellation of Scorpius. The brighter component has an apparent visual magnitude of 4.69, which is bright enough to be visible to the naked eye, while the fainter star is of magnitude 6.98. The distance to this pair can be estimated from the annual parallax shift of 6.49±0.51 mas, which places it roughly 500 light years away. It has a peculiar velocity of 16.5±2.4 km/s and is moving closer to the Sun with a heliocentric radial velocity of about −9 km/s, which will bring it to a perihelion distance of 450 ly (139 pc) in about 2.9 million years. This is a probable (73% chance) member of the Lower Centaurus–Crux group of the nearby Scorpius–Centaurus association (Sco OB2), or else (27% chance) it is a member of the Gould's Belt. (en)
  • 2 Scorpii, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna, belägen i den mellersta delen av stjärnbilden Skorpionen och har även Bayer-beteckningen A Scorpii. Den har en skenbar magnitud av ca 4,69 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 6,5 mas, beräknas den befinna sig på ett avstånd på ca 500 ljusår (ca 150 parsek) från solen. Den har en egenrörelse på 16,5 ± 2,4 km/s och rör sig närmare solen med en heliocentrisk radialhastighet på ca −9 km/s, vilket kommer att föra den till ett perihelionsavstånd på 450 ljusår om ca 2,9 miljoner år. Den ingår med en sannolikhet på 73 procent i gruppen Lower Centaurus Crux i den närliggande Scorpius-Centaurus-föreningen (Sco OB2), eller annars (27 proce (sv)
rdfs:label
  • 2 Scorpii (en)
  • 2 Scorpii (fr)
  • 2 Scorpii (pt)
  • 2 Scorpii (sv)
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  • 2 Scorpii (en)
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