Omicron Leonis
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 Omicron Leonis is located to the lower far right on this map of the constellation. |
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| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | 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/yr |
| Parallax (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]
[edit] References
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