- Delta Arae
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δ Arae 
δ Arae (lower center) in the Ara ConstellationObservation data
Epoch J2000.0 Equinox J2000.0Constellation Ara Right ascension 17h 31m 05.913s Declination -60° 41′ 1.853″ Apparent magnitude (V) 3.6 Characteristics Spectral type B8Vn U−B color index -0.31 B−V color index -0.1 Astrometry Radial velocity (Rv) 10 km/s Proper motion (μ) RA: -53.65 mas/yr
Dec.: -99.37 mas/yrParallax (π) 17.42 ± 0.73 mas Distance 187 ± 8 ly
(57 ± 2 pc)Absolute magnitude (MV) 3.52 Details Mass 18 M☉ Radius 7 R☉ Luminosity 20,000 L☉ Temperature 10,000–30,000 K Rotation 260 Km/s Other designations Database references SIMBAD data Data sources: Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)Delta Arae (δ Arae, δ Ara) is a double star in the constellation Ara.
Delta Arae is a blue-white B-type main sequence star with an apparent magnitude of 3.60m. It is 187 light years from the Earth. It has a 12th magnitude optical companion located 47.4 arcseconds away.
Delta Arae was known as 龜三 (meaning: "the 3rd (star) of Guī") in traditional Chinese astronomy.[1][2]
Allen erroneously called it with ζ Arae as Tseen Yin (天陰).[3] He probably confused constellation "Ara" with "Ari". Tseen Yin was lain[clarification needed] in Aries.[1][2]
Contents
Notes
- ^ a b Chevalier, S., and Tsuchihashi, P., (1911): "Catalogue d'Étoiles fixes, observés a Pekin sous l'Empereur Kien Long (Qianlong (Chien-Lung)), XVIIIe siecle", Annales de l'Observatoire Astronomique de Zô-Sé.
- ^ a b 伊世同 (Yi Shi Tong) (1981): 『中西対照恒星図表』科学出版社.(Chinese)
- ^ Allen, R. H., (1963). Star Names: Their Lore and Meaning (Reprint ed.). New York, NY: Dover Publications Inc.. p. 64. ISBN 0486210790.[1]
References
- 大崎正次 (1987): 「中国の星座・星名の同定一覧表」『中国の星座の歴史』 雄山閣出版, pp. 312, 328.(Japanese)
External links
See also
- Ara (Chinese astronomy)
- Aries (Chinese astronomy)
Bayer Gould 1 G. • 2 G. • 3 G. • 4 G. • 5 G. • 6 G. • 7 G. • 8 G. • 9 G. • 10 G. • 11 G. • 12 G. • 13 G. (η) • 14 G. • 15 G. • 16 G. • 17 G. • 18 G. • 19 G. • 20 G. • 21 G. (ρ¹) • 22 G. • 23 G. (ζ) • 24 G. (ρ²) • 25 G. (ε¹) • 26 G. • 27 G. • 28 G. • 29 G. • 30 G. • 31 G. (ε²) • 32 G. • 33 G. • 34 G. • 35 G. • 36 G. • 37 G. • 38 G. • 39 G. • 40 G. • 41 G. • 42 G. • 43 G. • 44 G. • 45 G. • 46 G. • 47 G. • 48 G. • 49 G. (ι) • 50 G. (γ) • 51 G. (β) • 52 G. • 53 G. (κ) • 54 G. • 55 G. • 56 G. • 57 G. • 58 G. • 59 G. • 60 G. (δ) • 61 G. • 62 G. (α, Choo) • 63 G. • 64 G. • 65 G. • 66 G. • 67 G. (σ) • 68 G. • 69 G. (π) • 70 G. • 71 G. (λ) • 72 G. • 73 G. • 74 G. • 75 G. (μ) • 76 G. • 77 G. (ν¹) • 78 G. (ν²) • 79 G. • 80 G. • 81 G. • 82 G. • 83 G. • 84 G. (θ) • 85Nearby Gliese 674 • Gliese 682 • 41 G.List Categories:- Stars with proper names
- Double stars
- Bayer objects
- Henry Draper Catalogue objects
- HIP objects
- HR objects
- Ara constellation
- B-type main sequence stars
- Multiple star stubs
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