60 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 55m 55.54693s[1] |
| Declination | +11° 37′ 33.6990″[1] |
| Apparent magnitude (V) | +5.44[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K5 III[3][2][4] |
| B−V color index | 1.462±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +25.38±0.16[1] km/s |
| Proper motion (μ) | RA: −15.443[1] mas/yr Dec.: −13.539[1] mas/yr |
| Parallax (π) | 3.8596 ± 0.1340 mas[1] |
| Distance | 850 ± 30 ly (259 ± 9 pc) |
| Details[5] | |
| Mass | 1.42±0.45 M☉ |
| Radius | 54[6] R☉ |
| Luminosity | 669.87[2] 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 | |
| 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
[edit]- ^ 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:
- ^ 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
