Astronomy:50 Boötis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 21m 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[1] mas |
| 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 | |
| Database references | |
| SIMBAD | data |
50 Boötis is a single[7] star located 275[1] light years away from the Sun in the northern constellation of Boötes.[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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 5.0 5.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ 6.0 6.1 "50 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=50+Boo.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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