36 Cancri

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36 Cancri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension  08h 37m 05.76881s[1]
Declination +09° 39′ 20.08650″[1]
Apparent magnitude (V) 5.92[2]
Evolutionary stage main sequence[3]
Spectral type A3 V[4]
B−V color index 0.083±0.003[2]
Radial velocity (Rv)+16.4±2.5[5] km/s
Proper motion (μ) RA: −28.271[1] mas/yr
Dec.: −4.237[1] mas/yr
Parallax (π)6.5093 ± 0.0735[1] mas
Distance501 ± 6 ly
(154 ± 2 pc)
Absolute magnitude (MV)0.05[2]
Mass2.66±0.05[3] M
Radius2.0[6] R
[3] L
[3] K
Rotational velocity (v sin i)44[3] km/s
Other designations
c Cnc, 36 Cnc, BD+10°1837, FK5 2675, HD 73143, HIP 42265, HR 3406, SAO 116953[7]
Database references

36 Cancri is a star in the southern part of the zodiac constellation of Cancer, located around 501 light years away from the Sun. It has the Bayer designation c Cancri; 36 Cancri is the Flamsteed designation. This object is a visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.92.[2] It is moving further from the Earth with a heliocentric radial velocity of +16 km/s.[5]

This is an ordinary A-type main-sequence star with a stellar classification of A3 V,[4] which indicates it is generating energy through hydrogen fusion at its core, it has a projected rotational velocity of 44 km/s, with 2.66[3] times the mass of the Sun and double the Sun's radius.[6] The star is radiating 93[3] times the Sun's luminosity from its photosphere at an effective temperature of 8,472 K.[3]


  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d 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.
  3. ^ a b c d e f g h Zorec, J.; et al. (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.
  4. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
  5. ^ a b 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, A61.
  6. ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
  7. ^ "36 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-28.