BP Boötis

BP Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 42m 50.760818s[1]
Declination +52° 21′ 39.24441″[1]
Apparent magnitude (V) 5.48[2]
Characteristics
Spectral type A0 Vp Si Cr[3]
U−B color index -0.1
B−V color index −0.042±0.004[2]
Variable type α2 CVn[4]
Astrometry
Radial velocity (Rv)−16.1±2.8[2] km/s
Proper motion (μ) RA: −66.214[1] mas/yr
Dec.: +29.308[1] mas/yr
Parallax (π)10.92 ± 0.18[1] mas
Distance299 ± 5 ly
(92 ± 2 pc)
Absolute magnitude (MV)+0.48[5]
Details[5]
Mass2.58±0.07 M☉
Radius2.7±0.2 R☉
Luminosity65 L☉
Surface gravity (log g)3.99±0.07 cgs
Temperature9,954 K
Rotation1.29557 days
Other designations
BP Boo, BD+52° 1898, HD 140728, HIP 76957, HR 5857, SAO 29628[6]
Database references
SIMBADdata

BP Boötis is an Alpha² Canum Venaticorum variable star in the constellation Boötes. It varies by 0.02 magnitude over 1.3 days.[7]

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 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.
  3. ↑ Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement Series, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
  4. ↑ Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61: 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
  5. 1 2 North, P. (June 1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics, 334: 181–187, arXiv:astro-ph/9802286, Bibcode:1998A&A...334..181N.
  6. ↑ "HD 140728". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 August 2018.
  7. ↑ Watson, Christopher (January 4, 2010), "BP Boötis", AAVSO Website, American Association of Variable Star Observers, retrieved 3 August 2014.
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