50 Camelopardalis

50 Camelopardalis
Location of 50 Camelopardalis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 07h 44m 04.1780s[1]
Declination +50° 26′ 01.658″[1]
Apparent magnitude (V) 5.36 + 8.40[2]
Characteristics
Spectral type A0IIIn[3] or B9Vn[4]
U−B color index 0.00[5]
B−V color index 0.00[5]
Astrometry
Radial velocity (Rv)+19.75±8.64[1] km/s
Proper motion (μ) RA: −5.434[1] mas/yr
Dec.: −26,351[1] mas/yr
Parallax (π)7.5728 ± 0.3503 mas[1]
Distance430 ± 20 ly
(132 ± 6 pc)
Absolute magnitude (MV)−1.39[6]
Details
A
Mass3.1[1] M☉
Radius5.4[1] R☉
Luminosity153[1] L☉
Surface gravity (log g)3.40[1] cgs
Temperature9,974[1] K
Metallicity [Fe/H]−0.01[7] dex
Rotational velocity (v sin i)202[8] km/s
Age298[1] Myr
Other designations
50 Cam, BD+50°1460, HD 61931, HIP 37701, HR 2969[9]
Database references
SIMBADdata

50 Camelopardalis is a double star[10] in the northern constellation of Lynx. This object is visible to the naked eye as a faint white star with an apparent visual magnitude of 5.4. It is 430 light years away and moving further from the Earth with a heliocentric radial velocity of 20 km/s.

50 Camelopardalis has a spectral classification of A0 or B9 and a luminosity class of V or III. The stellar spectrum is noted to have unusually nebulous absorption lines due to its rapid rotation. At an age of 300 million years, the star is modelled to be in the late stages of the main sequence. It has expanded to over five times the radius of the Sun and is radiating 153 times the luminosity of the Sun from its photosphere at an effective temperature of 9,974 K.[1]

Double star catalogues list an 8th-magnitude companion at a separation of 1″. Due to its closeness to the much brighter star, little is known about the companion.[10] The Tycho double star catalogue gives a proper motion similar to the bright primary star.[2]

  1. ^ a b c d e f g h i j k l m Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference tycho was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference gray1987 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference hr was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference gontcharov2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference glebocki2005 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. ^ a b Cite error: The named reference eggleton was invoked but never defined (see the help page).