Binary star system in the constellation Cancer
Nu Cancri , Latinised from ν Cancri, is a binary star in the zodiac constellation of Cancer . It is faintly visible to the naked eye with an apparent visual magnitude of +5.46. Based upon an annual parallax shift of 8.31 mas as seen from the Earth, the star is located roughly 390 light-years from the Sun .
This is a single-lined spectroscopic binary system with an orbital period of 3.8 years and an eccentricity of 0.35. The primary, component A, is a white-hued A-type giant star with a stellar classification of A0 III. It is a magnetic Ap star with a field strength of 846×10 T , showing abundance peculiarities in strontium , chromium and mercury . The star has 2.8 times the mass of the Sun and is radiating 93 times the Sun's luminosity from its photosphere at an effective temperature of 10,250 K .
References
^ 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 .
^ Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99, Bibcode :1966CoLPL...4...99J .
^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics , 393 (3): 897–911, arXiv :astro-ph/0205255 , Bibcode :2002A&A...393..897R , doi :10.1051/0004-6361:20020943 , S2CID 14070763 .
de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics , 546 : 14, arXiv :1208.3048 , Bibcode :2012A&A...546A..61D , doi :10.1051/0004-6361/201219219 , S2CID 59451347 , A61.
^ 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 .
^ Pourbaix, D.; et al. (2004), "SB : The ninth catalogue of spectroscopic binary orbits", Astronomy & Astrophysics , 424 (2): 727–732, arXiv :astro-ph/0406573 , Bibcode :2004A&A...424..727P , doi :10.1051/0004-6361:20041213 , S2CID 119387088 .
^ Wraight, K. T.; et al. (February 2012), "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society , 420 (1): 757–772, arXiv :1110.6283 , Bibcode :2012MNRAS.420..757W , doi :10.1111/j.1365-2966.2011.20090.x , S2CID 14811051 .
"nu. Cnc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-06-17.
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Location of ν Cancri (circled)
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