50 Boötis

50 Boötis
Observation data; Epoch J2000 Equinox J2000
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
	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 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 km/s.[4]

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.
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.
Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
"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.

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[GaiaDR2-1] 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.

[Anderson2012-2] 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.

[Cowley1969-3] 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.

[David2015-4] 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.

[PasinettiFracassini2001-5] Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.

[SIMBAD-6] "50 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 12, 2019.

[Eggleton2008-7] 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.