Probable multiple star system in the constellation Camelopardalis
4 Camelopardalis is a probablemultiple star in the northernconstellation ofCamelopardalis ,[ 11] light years away from the Sun, based upon parallax.[ 1] apparent visual magnitude of 5.29,[ 2] proper motion , traversing thecelestial sphere at an angular rate of″ [ 12] IC 2391 supercluster.[ 13] radial velocity of 22.5 km/s.[ 5]
The brighter member, designated component A, is classified as anAm star , which indicates that the spectrum shows abnormalities of certain elements.[ 14] [ 7] projected rotational velocity of 75[ 10] [ 7] mass of the Sun and 2.57[ 8] Sun's radius . It is radiating 18[ 2] Sun's luminosity from itsphotosphere at aneffective temperature of 7,700 K.[ 9]
There is a faint, magnitude 9.49 companion at anangular separation of[ 6] visual companion ″ [ 15] [ 6] ′ [ 16]
^a b c d e f Brown, A. G. A. ; et al. (Gaia collaboration) (2021)."Gaia Early Data Release 3: Summary of the contents and survey properties" .Astronomy & Astrophysics 649 : A1.arXiv :2012.01533 Bibcode :2021A&A...649A...1G .doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source atVizieR .^a b c d e f 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 . ^ 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,doi :10.1086/110819 ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data. SIMBAD ,Bibcode :1986EgUBV........0M ^a b Gontcharov, G. A. (November 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 . ^a b c Tokovinin, Andrei; Everett, Mark E.; Horch, Elliott P.; Torres, Guillermo; Latham, David W. (2019), "Speckle Observations and Orbits of Multiple Stars",The Astronomical Journal ,158 (4): 167,arXiv :1908.11445 Bibcode :2019AJ....158..167T ,doi :10.3847/1538-3881/ab4137 S2CID 201698428 . ^a b c d De Rosa, R. J.; et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc",Monthly Notices of the Royal Astronomical Society ,437 (2):1216– 1240,arXiv :1311.7141 Bibcode :2014MNRAS.437.1216D ,doi :10.1093/mnras/stt1932 ^a b Brown, A. G. A. ; et al. (Gaia collaboration ) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties" .Astronomy & Astrophysics 616 . A1.arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source atVizieR .^a b c d Takeda, Yoichi; et al. (October 2018), "Photospheric carbon, nitrogen, and oxygen abundances of A-type main-sequence stars*",Publications of the Astronomical Society of Japan ,70 (5): 91,arXiv :1807.06265 Bibcode :2018PASJ...70...91T ,doi :10.1093/pasj/psy091 , 91. ^a b Royer, F.; et al. (2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i in the northern hemisphere",Astronomy and Astrophysics ,393 (3):897– 911,arXiv :astro-ph/0205255 Bibcode :2002A&A...393..897R ,doi :10.1051/0004-6361:20020943 ,S2CID 14070763 ^a b "4 Cam" ,SIMBAD Centre de données astronomiques de Strasbourg , retrieved2019-04-14 .^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)",The Astronomical Journal ,129 (3):1483– 1522,arXiv :astro-ph/0412070 Bibcode :2005AJ....129.1483L ,doi :10.1086/427854 ,S2CID 2603568 . ^ Eggen, Olin J. (December 1995), "Reality Tests of Superclusters in the Young Disk Population",Astronomical Journal ,110 : 2862,Bibcode :1995AJ....110.2862E ,doi :10.1086/117734 . ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars",Astronomy and Astrophysics ,498 (3):961– 966,Bibcode :2009A&A...498..961R ,doi :10.1051/0004-6361/200810788 ^ Brown, A. G. A. ; et al. (Gaia collaboration) (2021)."Gaia Early Data Release 3: Summary of the contents and survey properties" .Astronomy & Astrophysics 649 : A1.arXiv :2012.01533 Bibcode :2021A&A...649A...1G .doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source atVizieR .^ Brown, A. G. A. ; et al. (Gaia collaboration) (2021)."Gaia Early Data Release 3: Summary of the contents and survey properties" .Astronomy & Astrophysics 649 : A1.arXiv :2012.01533 Bibcode :2021A&A...649A...1G .doi :10.1051/0004-6361/202039657 S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source atVizieR .
