Gamma Camelopardalis

Gamma Camelopardalis
Location of γ Cam (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 03h 50m 21.50892s[1]
Declination +71° 19′ 56.148″[1][2]
Apparent magnitude (V) 4.66[3] + 9.07[4]
Characteristics
Spectral type A2 IVn[5]
U−B color index +0.07[3]
B−V color index +0.03[3]
Astrometry
Radial velocity (Rv)0.2±2.5[6] km/s
Proper motion (μ) RA: +18.17[1] mas/yr
Dec.: −42.85[1] mas/yr
Parallax (π)9.09 ± 0.18 mas[1]
Distance359 ± 7 ly
(110 ± 2 pc)
Absolute magnitude (MV)−0.62[7]
Details
γ Cam A
Mass2.98±0.04[8] M☉
Radius2.5[9] R☉
Luminosity185[8] L☉
Temperature8,892[8] K
Rotational velocity (v sin i)205[10] km/s
Other designations
γ Cam, BD+70°259, FK5 138, GC 4557, HD 23401, HIP 17959, HR 1148, SAO 5006, CCDM 03504+7120[2]
Database references
SIMBADdata

Gamma Camelopardalis, Latinized from γ Camelopardalis, is a suspected wide binary star[11] system in the northern circumpolar constellation of Camelopardalis. With a visual magnitude of 4.66,[3] it is faintly visible to the naked eye. Based upon an annual parallax shift of 9.09 mas as seen from Earth,[1] this star is located about 359 light years from the Sun.

The brighter primary, designated component A, is a white-hued A-type subgiant star with a stellar classification of A2 IVn.[5] It is spinning rapidly with a projected rotational velocity of 205 km/s. This is giving the star an oblate shape with an equatorial bulge that is 17% larger than the polar radius.[10] It has about three[8] times the mass of the Sun and 2.5[9] times the Sun's radius. The star is radiating 185[8] times the Sun's luminosity from its photosphere at an effective temperature of 8,892 K.[8]

The magnitude 9.07 secondary, BD+70 260, designated component C, lies at an angular separation of 106.00 arc seconds along a position angle of 85°, as of 2011. Component B is a magnitude 12.40 visual companion at a separation of 56.30 arc seconds along position angle 247°.[4]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Mason2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d e f Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference vanBelle2012 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).