Star in the constellation Cassiopeia
42 Cassiopeiae is a possible binary star system in the northern circumpolar constellation of Cassiopeia . It is visible to the naked eye as a dim, blue-white hued star with a baseline apparent visual magnitude of +5.18. The system is located approximately 291 light years from the Sun based on parallax , and is drifting further away with a radial velocity of +7 km/s.
This is classified as a suspected eclipsing binary of the Algol type , with a period of 16.77 days and a magnitude decrease of 0.3. The primary is a B-type main-sequence star with a stellar classification of B9V. It is roughly 67 million years old and is spinning with a projected rotational velocity of 149 km/s. The star has 2.7 times the mass of the Sun and 2.6 times the Sun's radius . It is radiating 66 times the luminosity of the Sun from its photosphere at an effective temperature of 10,141 K.
References
^ 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 at VizieR .
^ 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 .
^ 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 .
^ 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 .
^ Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports , GCVS 5.1, 61 (1): 80–88, Bibcode :2017ARep...61...80S , doi :10.1134/S1063772917010085 , S2CID 125853869 .
^ Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal , 129 (3): 1642–1662, arXiv :astro-ph/0412542 , Bibcode :2005AJ....129.1642F , doi :10.1086/427855 , S2CID 119512018 .
^ Gullikson, Kevin; et al. (January 2016), "Direct Spectral Detection: An Efficient Method to Detect and Characterize Binary Systems", The Astronomical Journal , 151 (1): 16, arXiv :1511.05148 , Bibcode :2016AJ....151....3G , doi :10.3847/0004-6256/151/1/3 , S2CID 119305418 , 3.
"42 Cas" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-07-22.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 .
Hoffleit, Dorrit (1996), "A Catalogue of Correlations Between Eclipsing Binaries and Other Categories of Double Stars", The Journal of the American Association of Variable Star Observers , 24 (2): 105–116, Bibcode :1996JAVSO..24..105H .
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