12 Cassiopeiae

Star in the constellation Cassiopeia Cassiopeia constellation map.svg center 280 right Red circle.svg 8 12 Cas 514 466 Location of 12 Cassiopeiae (circled) J2000.0 Cassiopeia 00 24 47.5055 +61 49 51.808 +5.377 B9III +0.00 −0.16 -1.76 0.60 +14.126 −2.715 3.8102 0.0612 −1.27 3.1 5.7 386 10,728 −0.96 2.94 155 257 12 Cas, HR 93, HD 2011, BD+61°69, HIP 1960 12+Cas 12 Cassiopeiae (12 Cas) is a white giant in the constellation Cassiopeia, about 860 light years away. It has an apparent magnitude of 5.4, so it faintly visible to the naked eye. The spectrum of 12 Cassiopeiae is classified as a B9-type giant. About three times as massive as the Sun and 386 times as luminous, it has expanded away from the main sequence after exhausting its core hydrogen. It now has a radius of 5.7 y with an effective temperature of about commas 10728 K, leading to a bolometric luminosity of 386 y. References 430405961303214464 3 Stassun Keivan G. Oelkers Ryan J. Pepper Joshua Paegert Martin Lee Nathan De Torres Guillermo Latham David W. Charpinet Stéphane Dressing Courtney D. Huber Daniel Kane Stephen R. Lépine Sébastien Mann Andrew Muirhead Philip S. Rojas-Ayala Bárbara Silvotti Roberto Fleming Scott W. Levine Al Plavchan Peter The TESS Input Catalog and Candidate Target List The Astronomical Journal 20 August 2018 156 3 102 1538-3881 10.3847/1538-3881/aad050 2018AJ....156..102S 1706.00495 free Gontcharov G. A. Dependence of kinematics on the age of stars in the solar neighborhood Astronomy Letters December 2012 38 12 771–782 1063-7737 1562-6873 10.1134/S1063773712120031 2012AstL...38..771G 1606.08814 free Hoffleit D. Ellen Dorrit Hoffleit Jaschek C. Carlos Jaschek 1991 The Bright Star Catalogue New Haven Yale University Observatory 1991bsc..book.....H Anderson E. Francis Ch. XHIP: An extended hipparcos compilation Astronomy Letters May 2012 38 5 331–346 1063-7737 1562-6873 10.1134/S1063773712050015 2012AstL...38..331A 1108.4971 119257644 1 Cowley A. Cowley C. Jaschek M. Jaschek C. A study of the bright A stars. I. A catalogue of spectral classifications Astronomical Journal 74 375–406 April 1969 10.1086/110819 1969AJ.....74..375C 2000A&A...355L..27H The Tycho-2 catalogue of the 2.5 million brightest stars Astronomy and Astrophysics 355 L27 Høg E. Fabricius C. Makarov V. V. Urban S. Corbin T. Wycoff G. Bastian U. Schwekendiek P. Wicenec A. 2000 10.1888/0333750888/2862 2019A&A...628A..94A Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 Anders F. Khalatyan A. Chiappini C. Queiroz A. B. Santiago B. X. Jordi C. Girardi L. Brown A. G. A. Matijevič G. Monari G. Cantat-Gaudin T. Weiler M. Khan S. Miglio A. Carrillo I. Romero-Gómez M. Minchev I. De Jong R. S. Antoja T. Ramos P. Steinmetz M. Enke H. Astronomy and Astrophysics 628 A94 2019 1904.11302 10.1051/0004-6361/201935765 131780028 Zorec J. Royer F. Rotational velocities of A-type stars IV: Evolution of rotational velocities Astronomy & Astrophysics January 2012 537 A120 0004-6361 1432-0746 10.1051/0004-6361/201117691 2012A&A...537A.120Z 1201.2052 free 55586789 Category:Cassiopeia (constellation) Cassiopeiae, 12 0093 002011 001960 BD+61 0069 Category:B9III stars