"Beta Cam" redirects here. For the video technology, see
Betacam .
Yellow-hued star in the constellation Camelopardalis
β Camelopardalis Location of β Cam (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Camelopardalis Right ascension 05h 03m 25.08963s [ 1] Declination +60° 26′ 32.0895″[ 1] Apparent magnitude (V)4.02[ 2] Characteristics Spectral type G1Ib–IIa[ 3] U−Bcolor index +0.62[ 2] B−Vcolor index +0.93[ 2] R−Icolor index +0.49[ 2] Astrometry Radial velocity (Rv )−1.90[ 4] km/s Proper motion (μ)RA: −6.50[ 1] mas /yr Dec.: −14.15[ 1] mas /yr Parallax (π)3.74± 0.21 mas [ 1] Distance 870 ± 50 ly pc ) Absolute magnitude (MV )−3.1[ 5] Details Mass 6.5[ 3] M ☉ Radius ± 13[ 6] R ☉ Luminosity 1,592[ 7] L ☉ Surface gravity (log g )1.79[ 3] cgs Temperature 5,300[ 3] K Metallicity −0.06[ 8] dex Rotational velocity (v sin i )11.7[ 9] Age 53[ 3] Myr Other designations β Cam ,10 Camelopardalis ,BD +60°856FK5 182HD 31910HIP 23522HR 1603SAO 13351ADS 3615 AWDS J05034+6027Database references SIMBAD data Data sources: Hipparcos Catalogue ,CCDM (2002),Bright Star Catalogue (5th rev. ed.)
Beta Camelopardalis ,Latinised from β Camelopardalis, is the brighteststar in thenorthern constellation ofCamelopardalis . It is bright enough to be faintly visible to the naked eye, having anapparent visual magnitude of 4.02.[ 2] parallax shift of 3.74 mas as seen from Earth, it is located roughly 870 light-years from theSun . It is moving closer with aradial velocity of −1.90 km/s[ 4] [ 10]
This is a yellow-huedG-type supergiant /bright giant with astellar classification of G1 Ib–IIa.[ 3] projected rotational velocity of 11.7 km/s.[ 9] evolved star of this type. One possible explanation is that it may have engulfed a nearbygiant planet , such as ahot Jupiter .[ 11]
Beta Camelopardalis has 6.5[ 3] mass of the Sun and has expanded to around 58[ 6] Sun's radius . The star is radiating 1,592[ 7] Sun's luminosity from its enlargedphotosphere at aneffective temperature ofK [ 3] X-ray emission .[ 12]
β Cam has two visual[ 10] angular separation of 84 arcseconds ; and a 12th-magnitude star at 15 arcseconds.[ 13]
^a b c d e 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 c d e Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".CDS/ADC Collection of Electronic Catalogues .2237 .Bibcode :2002yCat.2237....0D . ^a b c d e f g h Lyubimkov, Leonid S.; Lambert, David L.; Korotin, Sergey A.; Rachkovskaya, Tamara M.; Poklad, Dmitry B. (2015)."Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants" .Monthly Notices of the Royal Astronomical Society .446 (4): 3447.arXiv :1411.2722 Bibcode :2015MNRAS.446.3447L .doi :10.1093/mnras/stu2299 ^a b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system".Astronomy Letters .32 (11):759– 771.arXiv :1606.08053 Bibcode :2006AstL...32..759G .doi :10.1134/S1063773706110065 .S2CID 119231169 . ^ Gray, David F.; Pugh, Teznie (2012)."The Third Signature of Granulation in Bright-giant and Supergiant Stars" .The Astronomical Journal .143 (4): 92.Bibcode :2012AJ....143...92G .doi :10.1088/0004-6256/143/4/92 ^a b Van Belle, G. T.; et al. (2009)."Supergiant temperatures and linear radii from near-infrared interferometry" .Monthly Notices of the Royal Astronomical Society .394 (4): 1925.arXiv :0811.4239 Bibcode :2009MNRAS.394.1925V .doi :10.1111/j.1365-2966.2008.14146.x S2CID 118372600 . ^a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012)."Fundamental parameters and infrared excesses of Hipparcos stars" .Monthly Notices of the Royal Astronomical Society .427 (1):343– 357.arXiv :1208.2037 Bibcode :2012MNRAS.427..343M .doi :10.1111/j.1365-2966.2012.21873.x S2CID 118665352 . ^ Kovtyukh, V. V.; Gorlova, N. I.; Belik, S. I. (2012)."Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants" .Monthly Notices of the Royal Astronomical Society .423 (4): 3268.arXiv :1204.4115 Bibcode :2012MNRAS.423.3268K .doi :10.1111/j.1365-2966.2012.21117.x S2CID 118683158 . ^a b Rodrigues Da Silva, R.; Canto Martins, B. L.; De Medeiros, J. R. (2015). "On the Nature of Rapidly Rotating Single Evolved Stars".The Astrophysical Journal .801 (1): 54.arXiv :1503.03447 Bibcode :2015ApJ...801...54R .doi :10.1088/0004-637X/801/1/54 .S2CID 119271718 . ^a b 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 . ^ Rodrigues da Silva, R.; Canto Martins, B. L.; De Medeiros, J. R. (March 2015). "On the Nature of Rapidly Rotating Single Evolved Stars".The Astrophysical Journal .801 (1): 6.arXiv :1503.03447 Bibcode :2015ApJ...801...54R .doi :10.1088/0004-637X/801/1/54 .S2CID 119271718 . 54. ^ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources",The Astrophysical Journal Supplement ,184 (1):138– 151,arXiv :0910.3229 Bibcode :2009ApJS..184..138H ,doi :10.1088/0067-0049/184/1/138 ,S2CID 119267456 ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001)."The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog" .The Astronomical Journal .122 (6): 3466.Bibcode :2001AJ....122.3466M .doi :10.1086/323920
