BP Boötis

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BP Boötis
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 42m 50.76018s
Declination +52° 21′ 39.2521″
Apparent magnitude (V) 5.485
Characteristics
Spectral type B9pSiCr[1]
U−B color index -0.1
B−V color index -0.07
Variable type α² CVn
Astrometry
Radial velocity (Rv) -16.1 km/s
Parallax (π) 10.92 ± 0.18 mas
Distance 299 ± 5 ly
(92 ± 2 pc)
Absolute magnitude (MV) +0.48[2]
Details
Mass 2.58 ± 0.07[2] M
Radius 2.7 ± 0.2[2] R
Luminosity 65[2] L
Surface gravity (log g) 3.99 ± 0.07[2] cgs
Temperature 9,954[2] K
Rotation 1.29557 days[2]
Other designations
BD+52 1898, HD 140728, HIP 76957, HR 5857, SAO 29628.
Database references
SIMBAD data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

BP Boötis is a Alpha² Canum Venaticorum variable star in the constellation Boötes. It varies by 0.02 magnitude over 1.3 days.[1]

References[edit]

  1. ^ a b Watson, Christopher (4 January 2010). "BP Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 3 August 2014. 
  2. ^ a b c d e f g 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