Astronomy:13 Cancri
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer[1] |
| Right ascension | 08h 10m 13.107s[2] |
| Declination | +25° 50′ 40.13″[2] |
| Apparent magnitude (V) | +6.41[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K3 III[4][1] |
| B−V color index | 1.420±0.015[1] |
| Astrometry | |
| Radial velocity (Rv) | 4.96±0.23[5] km/s |
| Proper motion (μ) | RA: −14.654 mas/yr Dec.: −30.976 mas/yr |
| Parallax (π) | 3.3894 ± 0.0255 mas |
| Distance | 962 ± 7 ly (295 ± 2 pc) |
| Absolute magnitude (MV) | −0.56[1] |
| Details[2] | |
| Mass | 4.90+0.04−0.11 M☉ |
| Radius | 34.1±0.2 R☉ |
| Luminosity | 486.0±6.5 L☉ |
| Surface gravity (log g) | 1.820±0.006 cgs |
| Temperature | 4,522±5 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
13 Cancri is a star in the zodiacal constellation of Cancer. Its name is a Flamsteed designation, abbreviated 13 Cnc; it has the Bayer designation ψ1 Cancri, although this is rarely used.[6] This is one of the few Bayer or Flamsteed designated stars that are not listed in the Bright Star Catalogue.[7][8] It is near the lower limit of stellar brightness that is still visible to the naked eye, having an apparent visual magnitude of +6.41.[3] Based on a parallax measurements, it is located at a distance of 962 light-years (295 pc) from the Earth. The star is drifting further away with a line of sight velocity of 5 km/s.[5] In 1986, O. J. Eggen included it as a probable member of the Hyades Stream of co-moving stars.[9]
This is an aging K-type giant star with a stellar classification of K3 III,[4] having exhausted the supply of hydrogen at its core and evolved away from the main sequence. Stellar models of this star indicate it has an estimated 4.9 times the mass of the Sun and has expanded to 34 times the Sun's radius. It is radiating 486 times the luminosity of the Sun from its photosphere at an effective temperature of 4,522 K.[2]
References
- ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. Bibcode: 2000A&A...355L..27H.
- ↑ 4.0 4.1 Adams, Walter S. et al. (1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". Astrophysical Journal 81: 187. doi:10.1086/143628. Bibcode: 1935ApJ....81..187A.
- ↑ 5.0 5.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002) 4027. Bibcode: 2004yCat.4027....0K.
- ↑ Bidelman, W. P. (1990). "Flamsteed stars not contained in the Yale "Catalogue of Bright Stars"". Bulletin d'Information du Centre de Données Stellaires 38: 13. Bibcode: 1990BICDS..38...13B.
- ↑ Wagman, M. (1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy 18 (3): 209–223. doi:10.1177/002182868701800305. Bibcode: 1987JHA....18..209W.
- ↑ Eggen, O. J. (April 1986). "Hyades and Sirius supercluster members brighter than magnitude (V) 7.1. II. Right ascension six to twelve hours". Publications of the Astronomical Society of the Pacific 98: 423–441. doi:10.1086/131772. Bibcode: 1986PASP...98..423E.
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