49 Camelopardalis

49 Camelopardalis

A visual band light curve for 49 Camelopardalis, adapted from Adelman and Kaewkornmaung, (2005)[1]>
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 07h 46m 27.41459s[2]
Declination +62° 49′ 49.8895″[2]
Apparent magnitude (V) 6.50[3] (6.43–6.48)[4]
Characteristics
Spectral type A7VpSrCrEuSiKsn[5]
B−V color index 0.262±0.002[3]
Variable type α2 CVn[4]
Astrometry
Radial velocity (Rv)6.5±0.5[3] km/s
Proper motion (μ) RA: −36.63[6] mas/yr
Dec.: −61.36[6] mas/yr
Parallax (π)10.4369 ± 0.0566 mas[2]
Distance313 ± 2 ly
(95.8 ± 0.5 pc)
Absolute magnitude (MV)1.58[3]
Details[7]
Mass1.92+0.14
−0.25 M☉
Radius2.32±0.33 R☉
Luminosity17.4+3.5
−2.9 L☉
Surface gravity (log g)3.99±0.13 cgs
Temperature7,740±460 K
Metallicity [Fe/H]−3.40±0.16 dex
Rotation4.28677±0.00003 d[8]
Rotational velocity (v sin i)25.8±1.0 km/s
Age891+489
−316 Myr
Other designations
49 Cam, BC Cam, BD+63°733, GC 10422, HD 62140, HIP 37934, HR 2977, SAO 14322[9]
Database references
SIMBADdata

49 Camelopardalis is a variable star in the northern circumpolar constellation of Camelopardalis,[9] located 313 light years from the Sun based on parallax measurements.[2] It has the variable star designation BC Camelopardalis; 49 Camelopardalis is the Flamsteed designation. This star is a challenge to view with the naked eye, having a baseline apparent visual magnitude of 6.50.[3] It is moving away from the Earth with a heliocentric radial velocity of +6.5 km/s.[3]

This is a magnetic chemically peculiar star[7] with a stellar classification of A7VpSrCrEuSiKsn,[5] indicating it is an A-type main-sequence star with overabundances of various elements including strontium and europium, as well as broad, "nebulous" lines. The magnetic field of 49 Camelopardalis shows a relatively complex structure, in combination with distinct abundance patterns across the surface.[10] It is classified as an Alpha2 Canum Venaticorum type variable and its brightness varies from visual magnitude +6.43 down to +6.48 with a rotationally-modulated period of 4.29 days.[4]

49 Camelopardalis has 1.9 times the mass of the Sun and 2.3 times the Sun's radius. It is around 891 million years old[7] and is spinning with a period of 4.29 days.[8] The star is radiating 17 times the luminosity of the Sun from its photosphere at an effective temperature of 7,740 K.[7]

  1. ^ Adelman & Kaewkornmaung 2005.
  2. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e f Anderson & Francis 2012.
  4. ^ a b c Samus et al. 2017.
  5. ^ a b Abt & Morrell 1995.
  6. ^ a b van Leeuwen 2007.
  7. ^ a b c d Sikora et al. 2019a.
  8. ^ a b Sikora et al. 2019b.
  9. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Silvester et al. 2017.