Star in the constellation Cancer
This article is about d Cancri. For other stars with this Bayer designation , see d Cancri .
25 Cancri is a common proper motion star system in the zodiac constellation of Cancer , located around 148 light-years away from the Sun . It has the Bayer designation d Cancri (d Cnc); 25 Cancri (25 Cnc) is the Flamsteed designation . It is near the lower limit of visibility to the naked eye in good viewing conditions, appearing as a dim, yellow-white-hued star with a combined apparent visual magnitude of 6.11. The pair have a relatively high proper motion , traversing the celestial sphere at an angular rate of 0.245″ per year. It is moving further from the Earth with a heliocentric radial velocity of +38 km/s.
Based upon a stellar classification of F6 V, the brighter component is an F-type main-sequence star that is generating energy through hydrogen fusion at its core. Cowley (1976) listed a class of F5 IIIm?, which suggests it may be an Am star . However, this has not been confirmed. It is about 2.5 billion years old with 1.51 times the mass of the Sun . The star is radiating 6.6 times the Sun's luminosity from its photosphere at an effective temperature of 6,487 K .
The companion is 4.19 magnitudes fainter than the primary, and lies at an angular separation of 16.798″ along a position angle of 310°, as of 2013. If the pair are gravitationally bound , then they orbit each other with a period of around 4.05 million years.
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 .
^ Harlan, E. A. (September 1969), "MK classifications for F- and G-type stars. I", Astronomical Journal , 74 : 916–919, Bibcode :1969AJ.....74..916H , doi :10.1086/110881 .
^ Tokovinin, Andrei (2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal , 147 (4): 87, arXiv :1401.6827 , Bibcode :2014AJ....147...87T , doi :10.1088/0004-6256/147/4/87 , S2CID 56066740 .
^ Casagrande, L.; et al. (June 2011), "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, arXiv :1103.4651 , Bibcode :2011A&A...530A.138C , doi :10.1051/0004-6361/201016276 , S2CID 56118016 .
^ LeBlanc, F.; et al. (November 2015), "Project VeSElkA: results of abundance analysis I - HD 71030, HD 95608, HD 116235 and HD 186568", Monthly Notices of the Royal Astronomical Society , 453 (4): 3766–3771, Bibcode :2015MNRAS.453.3766L , doi :10.1093/mnras/stv1466 .
"25 Cnc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-02-25.^ Riddle, Reed L.; et al. (January 1, 2015), "A Survey of the High Order Multiplicity of Nearby Solar-type Binary Stars with Robo-AO", The Astrophysical Journal , 799 (1): 4, arXiv :1411.0682 , Bibcode :2015ApJ...799....4R , doi :10.1088/0004-637X/799/1/4 , ISSN 0004-637X , S2CID 5642378 .
Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal , 129 (3): 1483–1522, arXiv :astro-ph/0412070 , Bibcode :2005AJ....129.1483L , doi :10.1086/427854 , S2CID 2603568 .
Cowley, A. P. (April 1976), "Spectral classification of the bright F stars", Publications of the Astronomical Society of the Pacific , 88 : 95–110, Bibcode :1976PASP...88...95C , doi :10.1086/129905 .
Categories :
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
**DISCLAIMER** We are not affiliated with Wikipedia, and Cloudflare.
The information presented on this site is for general informational purposes only and does not constitute medical advice.
You should always have a personal consultation with a healthcare professional before making changes to your diet, medication, or exercise routine.
AI helps with the correspondence in our chat.
We participate in an affiliate program. If you buy something through a link, we may earn a commission 💕
↑
Category