- Omicron Leonis
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Omicron Leonis 
Omicron Leonis is located to the lower far right on this map of the constellation.Observation data
Epoch J2000.0 Equinox J2000.0Constellation Leo Right ascension 09h 41m 09.03s[1] Declination +09° 53' 32.30"[1] Apparent magnitude (V) +3.53[1] Characteristics Spectral type F9III/A5mV[2] Astrometry Proper motion (μ) RA: -143.67[1] mas/yr
Dec.: -37.45[1] mas/yrParallax (π) 24.12 ± 0.97[1] mas Distance 135 ly
(41.4±0.1[2] pc)Orbit[2] Period (P) 14.498064 ± 0.000009 days Semimajor axis (a) 4.46 ± 0.01 mas Eccentricity (e) 0 Inclination (i) 57.6 ± 0.1° Longitude of the node (Ω) 191.4 ± 0.1° Periastron epoch (T) TJD 10629.831 ± 0.003 Details Mass 2.12/1.87 ± 0.01[2] M☉ Radius 5.9±0.5/2.2±0.3[2] R☉ Luminosity 39.4±2.4/15.4±1.0 [2] L☉ Temperature 6,000±200/7,600±400[2] K Age 8 × 108(estimate)[2] years Other designations Omicron Leonis (ο Leo, ο Leonis) is a binary star in the constellation Leo. It has the traditional name Subra.
The two stars of Subra are of spectral class F9III (a giant star) for the primary and A5mV (a main sequence star) for the secondary.[2] Their combined apparent magnitude is +3.53.[1]
References
Bayer α (Regulus) • β (Denebola) • γ (Algieba) • δ (Zosma) • ε (Algenubi) • ζ (Adhafera) • η • θ (Chertan) • ι • κ (Al Minliar al Asad) • λ (Alterf) • μ (Rasalas) • ν • ξ • ο (Subra) • π • ρ • σ • τ • υ • φ • χ • ψ • ω • b • c • d • e • f • g • h • k • l • m • n • o • p¹ • p² • p³ • AFlamsteed 1 (κ, Al Minliar al Asad) • 2 (ω) • 3 • 4 (λ, Alterf) • 5 (ξ) • 6 (h) • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 (ο, Subra) • 15 (f) • 16 (ψ) • 17 (ε, Algenubi) • 18 • 19 • 20 • 21 • 22 (g) • 23 • 24 (μ, Rasalas) • 27 (ν) • 29 (π) • 30 (η) • 31 (A) • 32 (α, Regulus) • 34 • 35 • 36 (ζ, Adhafera) • 37 • 39 • 40 • 41 (γ, Algieba) • 42 • 43 • 44 • 45 • 46 • 47 (ρ) • 48 • 49 • 50 • 51 (m) • 52 (k) • 53 (l) • 54 • 55 • 56 • 58 (d) • 59 (c) • 60 (b) • 61 (p²) • 62 (p³) • 63 (χ) • 64 • 67 • 68 (δ, Zosma) • 70 (θ, Chertan) • 71 • 72 • 73 (n) • 74 (φ) • 75 • 76 • 77 (σ) • 78 (ι) • 79 • 80 • 81 • 83 • 84 (τ) • 85 • 86 • 87 (e) • 88 • 89 • 90 • υ (91) • 92 • 93 • 94 (β, Denebola) • 95 • 18 LMi • 37 Sex • 52 LMiNearby Wolf 359 • AD • 2MASS 0937+2931 • Gliese 408 • EE • Gliese 436Other Categories:- Bayer objects
- Binary stars
- Leo constellation
- A-type main sequence stars
- Stars with proper names
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