BN Camelopardalis

BN Camelopardalis

A visual band light curve for BN Camelopardalis, adapted from Adelman (1997)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 05h 12m 22.43769s[2]
Declination +73° 56′ 48.03820″[2]
Apparent magnitude (V) 5.49[3] (5.34 to 5.58)[4]
Characteristics
Spectral type B9.5VpSi[5]
B−V color index −0.108±0.003[3]
Variable type α2 CVn[4]
Astrometry
Radial velocity (Rv)+9.3±2.8[3] km/s
Proper motion (μ) RA: +6.033[2] mas/yr
Dec.: –27.088[2] mas/yr
Parallax (π)10.5286 ± 0.2275 mas[2]
Distance310 ± 7 ly
(95 ± 2 pc)
Absolute magnitude (MV)+0.13[3]
Details
Mass3.05±0.13[6] M☉
Radius2.9±0.4[7] R☉
Luminosity110[6] L☉
Surface gravity (log g)4.15±0.11[7] cgs
Temperature11,561[6] K
Rotation2.73332 days[7]
Rotational velocity (v sin i)23[8] km/s
Other designations
BN Cam, BD+73°274, FK5 2387, HD 32650, HIP 24254, HR 1643, SAO 5455[9]
Database references
SIMBADdata

BN Camelopardalis is a suspected astrometric binary[10] in the northern circumpolar constellation of Camelopardalis. It appears as a variable star that is visible to the naked eye as a dim, white-hued point of light with an apparent visual magnitude that fluctuates around 5.49.[3] The system is located at a distance of around 310 light years from the Sun based on parallax,[2] and is drifting further away with a radial velocity of +9 km/s.[3]

The visible component is a weakly magnetic[11] chemically peculiar star[12][13] with a stellar classification of B9.5VpSi,[5] matching a B-type main-sequence star with an anomalous abundance of silicon. It is a variable star[14] that ranges in brightness from 5.34 down to 5.58.[4] Samus et al. (2017) have it categorized as an α2 Canum Venaticorum variable with a period of 2.7347 days,[4] while Adelman and Sutton (2007) found a period of 2.73501 days.[12] The star has three times the mass and radius of the Sun and is radiating 110 times the Sun's luminosity from its photosphere at an effective temperature of 11,561 K.[7][6]

  1. ^ Cite error: The named reference Adelman was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference netopil was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference aaa334_181 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Aurière2007 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Adelman2007 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference AAVSOBN was invoked but never defined (see the help page).