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. 60 Cancri is situated near the ecliptic , so it is subject to the occasional occultation by the Moon . It is moving away from the Earth with a heliocentric radial velocity of +25 km/s.
This is an aging giant star with a stellar classification of K5 III, indicating it has exhausted the hydrogen at its core and evolved off the main sequence . It is a suspected variable star of unknown type. The interferometry -measured angular diameter of the primary component, after correcting for limb darkening , is 1.94±0.02 mas , which, at its estimated distance, equates to a physical radius of about 54 times the radius of the Sun . It is around 1.15 billion years old with 1.4 times the mass of the Sun . The star is radiating 670 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,150 K.
References
^ 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 .
^ 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 .
^ 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 .
^ "60 Cnc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-03-09.
^ 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 .
^ Lang, Kenneth R. (2006), Astrophysical formulae Birkhäuser , ISBN 3-540-29692-1 The radius (R* ) is given by:
2
⋅
R
∗
=
(
10
−
3
⋅
259.1
⋅
1.94
)
AU
0.0046491
AU
/
R
⨀
≈
108
⋅
R
⨀
{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(10^{-3}\cdot 259.1\cdot 1.94)\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 108\cdot R_{\bigodot }\end{aligned}}}
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 .
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 .
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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