Beta Leonis Minoris
Beta Leonis Minoris, Latinized from β Leonis Minoris, is a binary star in the constellation of Leo Minor. It has an overall apparent visual magnitude of approximately 4.2. Although it is the only star in Leo Minor with a Bayer designation, it is only the second brightest star in the constellation (the brightest is 46 Leonis Minoris).
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 10h 27m 53.000s |
| Declination | +36° 42′ 25.96″ |
| Apparent magnitude (V) | 4.21 (4.40/6.12) |
| Characteristics | |
| Spectral type | G9III |
| U−B color index | +0.64 |
| B−V color index | +0.90 |
| R−I color index | +0.46 |
| A | |
| Spectral type | G8III-IV |
| B | |
| Spectral type | F8IV |
| Astrometry | |
| Radial velocity (Rv) | 8.52 km/s |
| Proper motion (μ) | RA: −127.68 mas/yr Dec.: −110.31 mas/yr |
| Parallax (π) | 21.19 ± 0.50 mas |
| Distance | 154 ± 4 ly (47 ± 1 pc) |
| Absolute magnitude (MV) | +0.85 |
| Orbit | |
| Period (P) | 13,965±40 |
| Semi-major axis (a) | 0.3782″±0.0007″ |
| Eccentricity (e) | 0.680±0.002 |
| Inclination (i) | 81.4±0.1° |
| Periastron epoch (T) | 2451411.1±4.8 JD |
| Argument of periastron (ω) (secondary) | 215.7±0.2° |
| Semi-amplitude (K1) (primary) | 7.93±0.05 km/s |
| Semi-amplitude (K2) (secondary) | 12.32±0.18 km/s |
| Details | |
| A | |
| Mass | 2.98±0.10 M☉ |
| Radius | 9.4±0.3 R☉ |
| Luminosity (bolometric) | 50.7±1.8 L☉ |
| Surface gravity (log g) | 2.85 cgs |
| Temperature | 4,097±927 K |
| Metallicity [Fe/H] | +0.09 dex |
| Rotational velocity (v sin i) | 2.54 km/s |
| Age | 1.2 Gyr |
| B | |
| Mass | 1.92±0.04 M☉ |
| Radius | 3.7±1.5 R☉ |
| Luminosity (bolometric) | 9.1±4.1 L☉ |
| Temperature | 5,211±843 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.