12 Cancri

Star in the constellation Cancer 12 Cancri J2000 Cancer 08 08 42.4457 +13 38 27.307 6.25 F3 V 0.480 0.007 −10.0 4.3 +2.776 −14,723 12.7085 0.1327 1.59 1.16 17.94 6357 88 commas 0.04 3.60 0.14 52.3 4.1 2.466 12 Cnc +14°1831 67483 39874 3184 97594 12 Cnc 2018-02-09 12+Cnc 12 Cancri is a star in the zodiac constellation Cancer. It has an apparent visual magnitude of 6.25, placing just below the normal limit for stars visible to the naked eye in good seeing conditions. The star displays an annual parallax shift of 12.7 mas as seen from Earth's orbit, which places it at a distance of about 257 light-years. It is moving toward the Sun with a radial velocity of around −10 km/s. This is an ordinary F-type main-sequence star with a stellar classification of F3 V, which indicates it is generating energy through hydrogen fusion at its core. It is spinning with a projected rotational velocity of 52 km/s and appears to be undergoing solar-like differential rotation with relative rate of α = 0.33 0.13. The star is about 2.5 billion years old with 1.16 times the mass of the Sun and is radiating nearly 18 times the Sun's luminosity from its photosphere at an effective temperature of around 6357 K commas. References 653239928447149056 Differential rotation in rapidly rotating F-stars Reiners Ansgar Schmitt Jürgen H. M. M. Astronomy and Astrophysics 412 3 813−819 December 2003 10.1051/0004-6361:20034255 2003A&A...412..813R astro-ph/0309616 16900202 . XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . Balachandran Suchitra Lithium depletion and rotation in main-sequence stars Astrophysical Journal, Part 1 . 354 May 1, 1990 310–332 10.1086/168691 1990ApJ...354..310B de Bruijne J. H. J. Eilers A.-C. Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project Astronomy & Astrophysics 546 A61 14 October 2012 10.1051/0004-6361/201219219 2012A&A...546A..61D 1208.3048 59451347 . Ammler-von Eiff Matthias Reiners Ansgar New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? Astronomy & Astrophysics 1204.2459 542 A116 June 2012 . 10.1051/0004-6361/201118724 2012A&A...542A.116A 53666672 1 Casagrande L. Schönrich R. Asplund M. Cassisi S. Ramírez I. Meléndez J. Bensby T. Feltzing S. New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey Astronomy and Astrophysics 530 A138 June 2011 10.1051/0004-6361/201016276 2011A&A...530A.138C 1103.4651 56118016 . The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets The Astrophysical Journal David Trevor J. Hillenbrand Lynne A. 804 2 146 2015 10.1088/0004-637X/804/2/146 2015ApJ...804..146D 1501.03154 33401607 . Category:F3V stars Category:Cancer (constellation) Category:Durchmusterung objects Cancri, 12 067483 3184 3184