60 Cancri

60 Cancri
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cancer
Right ascension	08h 55m 55.54693s
Declination	+11° 37′ 33.6990″
Apparent magnitude (V)	+5.44
Characteristics
Evolutionary stage	giant
Spectral type	K5 III
B−V color index	1.462±0.004
Astrometry
Radial velocity (Rv)	+25.38±0.16 km/s
Proper motion (μ)	RA: −15.443 mas/yr ; Dec.: −13.539 mas/yr
Parallax (π)	3.8596 ± 0.1340 mas
Distance	850 ± 30 ly ; (259 ± 9 pc)
Details
Mass	1.42±0.45 M☉
Radius	54 R☉
Luminosity	669.87 L☉
Surface gravity (log g)	1.28±0.11 cgs
Temperature	4,150±92 K
Metallicity [Fe/H]	−0.01±0.05 dex
Age	1.15+0.67; −0.43 Gyr
Other designations
	60 Cnc, NSV 4308, BD+12°1941, GC 12339, HD 76351, HIP 43851, HR 3550, SAO 98235
Database references
SIMBAD	data

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]

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

^ ^a ^b ^c ^d ^e ^f ^g 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.
^ ^a ^b ^c ^d ^e ^f 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.
^ ^a ^b 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.
^ ^a ^b "60 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-09.
^ ^a ^b ^c 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.
^ ^a ^b 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:
${\begin{aligned}2\cdot R_{*}&={\frac {(10^{-3}\cdot 259.1\cdot 1.94)\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 108\cdot R_{\bigodot }\end{aligned}}$
^ 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

[GaiaDR2-1] ^ ^a ^b ^c ^d ^e ^f ^g 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.

[Anderson2012-2] ^ ^a ^b ^c ^d ^e ^f 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.

[Adams1935-3] 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.

[SIMBAD-4] "60 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-09.

[Feuillet2016-5] 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.

[lang2006-6] 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:
${\begin{aligned}2\cdot R_{*}&={\frac {(10^{-3}\cdot 259.1\cdot 1.94)\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 108\cdot R_{\bigodot }\end{aligned}}$

[White1987-7] 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.

[Samus2017-8] 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.

[Richichi2005-9] 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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