Back BK Camelopardalis AST BK Camelopardalis Spanish بی‌کا زرافه Persian BK Camelopardalis French BK Camelopardalis Swedish 上丞 Chinese

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).
From Wikipedia, the free encyclopedia · View on Wikipedia

Developed by Nelliwinne