| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15 21 48.57546 |
| Declination | +32° 56′ 01.2942″ |
| Apparent magnitude (V) | 5.38 |
| Characteristics | |
| Spectral type | B9 Vn |
| B−V color index | −0.051±0.002 |
| Astrometry | |
| Radial velocity (Rv) | −9.0±3.5 km/s |
| Proper motion (μ) | RA: −48.846 mas/yr Dec.: +13.916 mas/yr |
| Parallax (π) | 11.8607 ± 0.1288 mas |
| Distance | 275 ± 3 ly (84.3 ± 0.9 pc) |
| Absolute magnitude (MV) | 0.86 |
| Details | |
| Mass | 3.31 M☉ |
| Radius | 3.1 R☉ |
| Luminosity | 55.17 L☉ |
| Surface gravity (log g) | 4.35 cgs |
| Temperature | 12,140±413 K |
| Rotational velocity (v sin i) | 232 km/s |
| Age | 174 Myr |
| Other designations | |
| 50 Boo, BD+33°2581, FK5 1395, GC 20672, HD 136849, HIP 75178, HR 5718, SAO 64656 | |
| Database references | |
| SIMBAD | data |
50 Boötis is a single star located 275 light years away from the Sun in the northern constellation of Boötes. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.38. The object is moving closer to the Earth with a heliocentric radial velocity of −9 km/s.
This is a B-type main-sequence star with a stellar classification of B9 Vn, where the 'n' notation indicates "nebulous" lines due to rapid rotation. It is 174 million years old with a projected rotational velocity of 232 km/s. The star has 3.31 times the mass of the Sun and about 3.1 times the Sun's radius. It is radiating 55 times the Sun's luminosity from its photosphere at an effective temperature of 12,140 K.
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ "50 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 12, 2019.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
