- Omicron Aquarii
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ο Aquarii Observation data
Epoch J2000 Equinox J2000Constellation Aquarius Right ascension 22h 03m 18.8441s Declination -02° 09′ 19.307″ Apparent magnitude (V) 4.7 Characteristics Spectral type B7IVe U−B color index -0.41 B−V color index -0.06 Variable type Gamma Cassiopeiae Astrometry Radial velocity (Rv) 12 km/s Proper motion (μ) RA: 24.81 mas/yr
Dec.: -11.14 mas/yrParallax (π) 8.56 ± 0.81 mas Distance 380 ± 40 ly
(120 ± 10 pc)Absolute magnitude (MV) 2.07 Details Mass 18 M☉ Radius 7 R☉ Luminosity 20,000 L☉ Temperature 10,000–30,000 K Other designations Database references SIMBAD data Data sources: Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)Omicron Aquarii (ο Aqr, ο Aquarii) is a star in the constellation Aquarius. It has the traditional star name Kae Uh, from the Chinese 蓋屋 (Mandarin gàiwū) "the roof".
In Chinese, 蓋屋 (Gài Wū), meaning Roofing, refers to an asterism consisting of ο Aquarii and 32 Aquarii.[1] Consequently, ο Aquarii itself is known as 蓋屋一 (Gài Wū yī, English: the First Star of Roofing.)[2]
Omicron Aquarii is a blue-white B-type subgiant with a mean apparent magnitude of +4.74. It is approximately 381 light years from Earth. It is classified as a Gamma Cassiopeiae type variable star and its brightness varies from magnitude +4.68 to +4.89.
References
- ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ^ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 16 日
Stars of Aquarius Bayer Flamsteed 1 • 2 (ε, Albali) • 3 • 4 • 5 • 6 (μ) • 7 • 8 • 9 • 10 • 11 • 12 • 13 (ν) • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 (β, Sadalsuud) • 23 (ξ, Bunda) • 24 • 25 • 26 • 28 • 29 • 30 • 31 (ο) • 32 • 33 (ι) • 34 (α, Sadalmelik) • 35 • 36 • 37 • 38 • 39 • 40 • 41 • 42 • 43 (θ, Ancha) • 44 • 45 • 46 (ρ) • 47 • 48 (γ, Sadachbia) • 49 • 50 • 51 • 52 (π, Seat) • 53 • 54 • 55 (ζ) • 56 • 57 (σ) • 58 • 59 (υ) • 60 • 61 • 62 (η) • 63 (κ, Situla) • 64 • 65 • 66 • 67 • 68 • 69 (τ1) • 70 • 71 (τ2) • 72 • 73 (λ) • 74 • 75 • 76 (δ, Skat) • 77 • 78 • 80 • 82 • 83 • 85 • 86 • 87 • 88 • 89 • 90 (φ) • 91 (ψ1) • 92 (χ) • 93 (ψ2) • 94 • 95 (ψ3) • 96 • 97 • 98 • 99 • 100 • 101 • 102 (ω1) • 103 • 104 • 105 (ω2) • 106 • 107 • 108List Categories:- Star stubs
- Variable star stubs
- Stars with proper names
- Henry Draper Catalogue objects
- Bayer objects
- Aquarius constellation
- Flamsteed objects
- B-type subgiants
- Gamma Cassiopeiae variables
- Emission-line stars
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