| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h21m 48.57546s[1] |
| Declination | +32° 56′ 01.2942″[1] |
| Apparent magnitude (V) | 5.38[2] |
| Characteristics | |
| Spectral type | B9 Vn[3] |
| B−V color index | −0.051±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | −9.0±3.5[2] km/s |
| Proper motion (μ) | RA: −48.846[1] mas/yr Dec.: +13.916[1] mas/yr |
| Parallax (π) | 11.8607 ± 0.1288 mas[1] |
| Distance | 275 ± 3 ly (84.3 ± 0.9 pc) |
| Absolute magnitude (MV) | 0.86[2] |
| Details | |
| Mass | 3.31[4] M☉ |
| Radius | 3.1[5] R☉ |
| Luminosity | 55.17[2] L☉ |
| Surface gravity (log g) | 4.35[4] cgs |
| Temperature | 12,140±413[4] K |
| Rotational velocity (v sin i) | 232[4] km/s |
| Age | 174[4] Myr |
| Other designations | |
50 Boo, BD+33°2581, FK5 1395, GC 20672, HD 136849, HIP 75178, HR 5718, SAO 64656[6] | |
| Database references | |
| SIMBAD | data |
50 Boötis is a single[7] star located 275[1] light years away from the Sun in the northern constellationofBoötes.[6] It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.38.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −9 km/s.[2]
This is a B-type main-sequence star with a stellar classification of B9 Vn,[3] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It is 174[4] million years old with a projected rotational velocity of 232[4] km/s. The star has 3.31[4] times the mass of the Sun and about 3.1[5] times the Sun's radius. It is radiating 55[2] times the Sun's luminosity from its photosphere at an effective temperature of 12,140 K.[4]
