Star in the constellation Camelopardalis
Gamma Camelopardalis , Latinized from γ Camelopardalis, is a suspected wide binary star [ 10] circumpolar constellation of Camelopardalis . With a visual magnitude of 4.66,[ 3] parallax shift of 9.09 mas as seen from Earth,[ 1] 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] 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.[ 9] [ 8] mass of the Sun and 5.73 times the Sun's radius .[ a] [ 8] 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]
Notes
^ a b Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the being the solar nominal effective temperature of 5,772 K :
(
5
,
772
8
,
892
)
4
⋅
185
=
5.73
R
⊙
.
{\displaystyle {\sqrt {{\biggl (}{\frac {5,772}{8,892}}{\biggr )}^{4}\cdot 185}}=5.73\ R_{\odot }.}
References
^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653– 664, arXiv :0708.1752 Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 . ^ a b "gam Cam" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-09-08 .^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99, Bibcode :1966CoLPL...4...99J . ^ a b Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal , 122 (6): 3466, Bibcode :2001AJ....122.3466M , doi :10.1086/323920 ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal , 74 : 375– 406, Bibcode :1969AJ.....74..375C , doi :10.1086/110819 . ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv :1108.4971 Bibcode :2012AstL...38..331A , doi :10.1134/S1063773712050015 , S2CID 119257644 . ^ a b c d e f g Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics , 537 : A120, arXiv :1201.2052 Bibcode :2012A&A...537A.120Z , doi :10.1051/0004-6361/201117691 , S2CID 55586789 . ^ a b van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review , 20 (1): 51, arXiv :1204.2572 Bibcode :2012A&ARv..20...51V , doi :10.1007/s00159-012-0051-2 , S2CID 119273474 . ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869– 879, arXiv :0806.2878 Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 .
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