BK Camelopardalis

BK Camelopardalis
Location of BK Camelopardalis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 03h 19m 59.27222s[1]
Declination +65° 39′ 08.2519″[1]
Apparent magnitude (V) 4.74[2] (4.76 - 4.90)[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type B2.5 Vne[5]
U−B color index −0.77[6]
B−V color index −0.108±0.002[2]
R−I color index −0.13[6]
Variable type Be star[3]
Astrometry
Radial velocity (Rv)−3.4±3.5[2] km/s
Proper motion (μ) RA: +10.506[1] mas/yr
Dec.: −14.677[1] mas/yr
Parallax (π)6.0704 ± 0.3539 mas[1]
Distance540 ± 30 ly
(165 ± 10 pc)
Absolute magnitude (MV)−2.07[2]
Details
Mass7.5[5] M☉
Radius4.0[7] R☉
Luminosity1080.69[2] L☉
Surface gravity (log g)4.20[4] cgs
Temperature18,720[4] K
Rotational velocity (v sin i)328[4] km/s
Age31.6[5] Myr
Other designations
BK Cam, BD+65°340, HD 20336, HIP 15520, HR 985, SAO 12704[8]
Database references
SIMBADdata

BK Camelopardalis is a variable star in the northern circumpolar constellation of Camelopardalis, near the constellation border with Cassiopeia. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude that fluctuates around 4.74.[2] The star is located approximately 540 light years away from the Sun based on parallax.[1] It is a proposed member of the Cassiopeia–Taurus group of co-moving stars.[9]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference zorec was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference ducati was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference underhill was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference deZeeuw1999 was invoked but never defined (see the help page).