Omicron Leonis
From Infogalactic: the planetary knowledge core
(Redirected from Subra)
 Omicron Leonis is located to the lower far right on this map of the constellation. |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Leo |
| Right ascension | 09h 41m 09.03s |
| Declination | +09° 53' 32.30" |
| Apparent magnitude (V) | +3.52[1] |
| Characteristics | |
| Spectral type | F8-G0III/A7m[2] |
| U−B color index | 0.21[1] |
| B−V color index | 0.49[1] |
| Astrometry | |
| Proper motion (μ) | RA: -143.20[3] mas/yr Dec.: -37.20[3] mas/yr |
| Parallax (π) | 25.03[3] ± 0.22 mas |
| Distance | 135 ly (41.4±0.1[4] pc) |
| Orbit[4] | |
| Period (P) | 14.498064 ± 0.000009 days |
| Semi-major 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[4] M☉ |
| Radius | 5.9±0.5/2.2±0.3[4] R☉ |
| Luminosity | 39.4±2.4/15.4±1.0 [4] L☉ |
| Temperature | 6,000±200/7,600±400[4] K |
| Age | 8 × 108(estimate)[4] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
Omicron Leonis (ο Leo, ο Leonis), known also by its traditional name, Subra,[5] is a binary star in the constellation of Leo, west of Regulus, some 130 light years from here, where it marks one of the lion's forepaws.
The primary is given the type F8-G0III giant and the secondary (Subra-B) is type A7m dwarf.[4] Their combined apparent magnitude is +3.52.
References
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- Omicron Leo/Subra in Kaler Stars [1]
- Subra (HIP 47508) Relates to the A star, Subra-B
- Subra - Omi Leonis brief data.
- ↑ 1.0 1.1 1.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Jim Kaler's website: http://stars.astro.illinois.edu/sow/subra.html (online 6th Sep 2015)
