Star in the constellation Cancer
This article is about d Cancri. For other stars with this Bayer designation , see d Cancri .
20 Cancri is an astrometric binary star system in the constellation Cancer , located about 372 light-years away from the Sun . This system has the Bayer designation d Cancri ; 20 Cancri is the Flamsteed designation . It is just visible to the naked eye under good viewing conditions, appearing as a dim, white-hued star with an apparent visual magnitude of 5.94. The pair are moving further from the Earth with a heliocentric radial velocity of +36 km/s, and are members of the Hyades Supercluster .
The visible component of this system is an ordinary A-type main-sequence star with a stellar classification of A9 V, which indicates it is generating energy by hydrogen fusion at its core . It has 2.4 times the mass of the Sun and is radiating 60 times the Sun's luminosity from its photosphere at an effective temperature of 7,907 K .
References
^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 . Bibcode :2023A&A...674A...1G . doi :10.1051/0004-6361/202243940 . S2CID 244398875 .
Gaia DR3 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.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics , 537 : A120, arXiv :1201.2052 , Bibcode :2012A&A...537A.120Z , doi :10.1051/0004-6361/201117691 , S2CID 55586789 .
^ 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.
^ "20 Cnc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-02-25.
Makarov, V. V.; Kaplan, G. H. (May 2005), "Statistical Constraints for Astrometric Binaries with Nonlinear Motion", The Astronomical Journal , 129 (5): 2420–2427, Bibcode :2005AJ....129.2420M , doi :10.1086/429590 .
Eggen, Olin J. (April 1996), "The Stellar Content of Star Stream I", Astronomical Journal , 111 : 1615, Bibcode :1996AJ....111.1615E , doi :10.1086/117901 .
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