Kappa Columbae
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba[1] |
| Right ascension | 06h 16m 33.135s[2] |
| Declination | −35° 08′ 25.85″[2] |
| Apparent magnitude (V) | 4.37[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K0.5 IIIa[4] or G9IIIb CN0.5[5] |
| U−B color index | +0.83[3] |
| B−V color index | +1.00[3] |
| Variable type | Suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | 23.20±0.13[2] km/s |
| Proper motion (μ) | RA: +0.614 mas/yr[2] Dec.: +87.903 mas/yr[2] |
| Parallax (π) | 17.3842±0.0832 mas[2] |
| Distance | 187.6 ± 0.9 ly (57.5 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.63[1] |
| Details | |
| Mass | 2.50+0.50 −0.04[2] M☉ |
| Radius | 10.7±0.2[2] R☉ |
| Luminosity | 60.73+0.55 −0.54[2] L☉ |
| Surface gravity (log g) | 2.682 cgs |
| Temperature | 4,937+5 −6[2] K |
| Metallicity [Fe/H] | +0.11[4] dex |
| Age | 622+64 −253[2] Myr |
| Other designations | |
| κ Col, NSV 2897, CD−35°2800, FK5 238, GC 8062, HD 43785, HIP 29807, HR 2256, SAO 196643[7] | |
| Database references | |
| SIMBAD | data |
Kappa Columbae is a solitary[8] star in the southern constellation of Columba. Its name is a Bayer designation that is Latinized from κ Columbae, and abbreviated Kappa Col or κ Col. It has an apparent visual magnitude of 4.37,[3] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 17.38 mas,[2] it is located at a distance of 187.6 light-years (57.5 pc) from the Sun. It has a peculiar velocity of 20.2±1.9 km/s, making it a candidate runaway star.[9]
This is an evolved K-type giant star with a stellar classification of K0.5 IIIa.[4] At the age of 622 million years, it has 2.50 times the mass of the Sun and has expanded to 10.7 times the Sun's radius.The star radiates 60.7 times the solar luminosity from its outer atmosphere at an effective temperature of 4,937 K.[2] It is catalogued as a suspected variable star.[6]
In Chinese, 孫 (Sūn), meaning Grandson, refers to an asterism consisting of κ Columbae and θ Columbae.[10] Consequently, κ Columbae itself is known as 孫一 (Sūn yī, English: the First Star of Grandson).[11]
References
[edit]- 1 2 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.
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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.
- 1 2 3 4 Johnson, H. L.; et al. (1999), "UBVRIJKL photometry of the bright stars", Commission Lunar and Planetary Laboratory, 4: 99, Bibcode:1966CoLPL...4...99J.
- 1 2 3 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
- ↑ Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2004), Combined General Catalogue of Variable Stars (GCVS4.2), retrieved 2016-12-26.
- ↑ "kap Col", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2016-12-25.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ↑ Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
- ↑ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ↑ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 16 日 Archived 2011-08-22 at the Wayback Machine
