13 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| 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 | |
| ψ1 Cancri, 13 Cnc, BD+26°1728, GC 11082, HD 67690, HIP 40007, SAO 79991, CCDM 08102+2551, WDS J08102+2551A | |
| 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
- ^ a b c d 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. XHIP record for this object at VizieR.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b 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.
- ^ a b Adams, Walter S.; et al. (1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628.
- ^ a b 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.
- ^ 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. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305. S2CID 118445625.
- ^ 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. Bibcode:1986PASP...98..423E. doi:10.1086/131772.