60_Cancri

60 Cancri

60 Cancri

Orange-hued giant star in the constellation Cancer

60 Cancri is a star in the zodiac constellation Cancer, located about 850  light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of +5.44.[2] 60 Cancri is situated near the ecliptic, so it is subject to the occasional occultation by the Moon.[7] It is moving away from the Earth with a heliocentric radial velocity of +25 km/s.[1]

Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...

This is an aging giant star with a stellar classification of K5 III,[3] indicating it has exhausted the hydrogen at its core and evolved off the main sequence. It is a suspected variable star of unknown type.[8] The interferometry-measured angular diameter of the primary component, after correcting for limb darkening, is 1.94±0.02 mas,[9] which, at its estimated distance, equates to a physical radius of about 54 times the radius of the Sun.[6] It is around 1.15 billion years old with 1.4 times the mass of the Sun.[5] The star is radiating 670[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,150 K.[5]

References

  1. [1]
    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. [2]
    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.
  3. [3]
    Adams, Walter S.; et al. (April 1935), "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars", Astrophysical Journal, 81: 187, Bibcode:1935ApJ....81..187A, doi:10.1086/143628.
  4. [4]
    "60 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-09.
  5. [5]
    Feuillet, Diane K.; et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal, 817 (1): 40, arXiv:1511.04088, Bibcode:2016ApJ...817...40F, doi:10.3847/0004-637X/817/1/40, S2CID 118675933.
  6. [6]
    Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
  7. [7]
    White, Nathaniel M.; Feierman, Barry H. (September 1987), "A Catalog of Stellar Angular Diameters Measured by Lunar Occultation", Astronomical Journal, 94: 751, Bibcode:1987AJ.....94..751W, doi:10.1086/114513.
  8. [8]
    Samus N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  9. [9]
    Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
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