- Omega Sagittarii
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ω Sagittarii Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS)Constellation Sagittarius Right ascension 19h 55m 50.3577s[1] Declination −26° 17′ 58.223″[1] Apparent magnitude (V) 4.70[1] Characteristics Spectral type G5IV[1] U−B color index +0.32[2] B−V color index +0.75[2] R−I color index +0.37[2] Astrometry Radial velocity (Rv) −21.0 ± 0.9[1] km/s Proper motion (μ) RA: 203.96[1] mas/yr
Dec.: 74.40[1] mas/yrParallax (π) 42.03 ± 0.94[1] mas Distance 78 ± 2 ly
(23.8 ± 0.5 pc)Absolute magnitude (MV) 2.82[3] Details Radius 1.1[4] R☉ Temperature 5400[5] K Metallicity [Fe/H] = 0.00[5] Rotational velocity (v sin i) 2[5] km/s Age 2.9 (2.8 to 3.0) × 109[5] years Other designations Database references SIMBAD data Omega Sagittarii (Omega Sgr, ω Sagittarii, ω Sgr) is a G-type subgiant star in the constellation of Sagittarius.[1] It has an apparent visual magnitude of approximately 4.70. It is the northeast corner of the asterism called the Terebellum and at approximately 78 light years from Earth, it is the nearest of the four stars in this asterism.[1]
References
- ^ a b c d e f g h i j k LTT 7872 -- High proper-motion Star, database entry, SIMBAD. Accessed on line November 19, 2009.
- ^ a b c HR 7597, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 19, 2009.
- ^ From apparent magnitude and parallax.
- ^ HD 188376, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 19, 2009.
- ^ a b c d HD 188376, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line November 19, 2009.
Bayer α (Rukbat) • β¹ (Arkab Prior) • β² (Arkab Posterior) • γ¹ • γ² (Alnasl) • δ (Kaus Media) • ε (Kaus Australis) • ζ (Ascella) • η • θ¹ • θ² • ι • κ¹ • κ² • λ (Kaus Borealis) • μ (Polis) • ν¹ (Ain al Rami) • ν² • ξ¹ • ξ² • ο • π (Albaldah) • ρ¹ • ρ² • σ (Nunki) • τ • υ • φ (Nanto) • χ¹ • χ² • χ³ • ψ • ω • b¹ • c • d • e¹ • e² • f • g • h¹ • h² • AFlamsteed 3 • 4 • 6 • 7 • 9 • 10 (γ², Alnasl) • 11 • 13 (μ, Polis) • 14 • 15 • 16 • 17 • 18 • 19 (δ, Kaus Media) • 20 (ε, Kaus Australis) • 21 • 22 (λ, Kaus Borealis) • 24 • 25 • 26 • 27 (φ, Nanto) • 28 • 29 • 30 • 32 (ν¹, Ain al Rami) • 33 • 34 (σ, Nunki) • 35 (ν²) •36 (ξ¹) • 37 (ξ²) • 38 (ζ, Ascella) • 39 (ο) • 40 (τ) • 41 (π, Albaldah) • 42 (ψ) • 43 (d) • 44 (ρ¹) • 45 (ρ²) • 46 (υ) • 47 (χ¹) • 48 (χ²) • 49 (χ³) • 50 • 51 (h¹) • 52 (h²) • 53 • 54 (e¹) • 55 (e²) • 56 (f) • 57 • 58 (ω) • 59 (b¹) • 60 (A) • 61 (g) • 62 (c) • 63 • 65 • 63 OphNearby Ross 154 • Gliese 783 • Gliese 745Other Categories:- Sagittarius constellation
- G-type subgiants
- Bayer objects
- Flamsteed objects
- Henry Draper Catalogue objects
- HIP objects
- Star stubs
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