Astronomy:Xi1 Capricorni
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Short description: Star in the constellation Capricornus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Capricornus |
| Right ascension | 20h 11m 57.89778s[1] |
| Declination | −12° 23′ 32.6484″[1] |
| Apparent magnitude (V) | +6.34[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| B−V color index | +1.21[2] |
| Astrometry | |
| Radial velocity (Rv) | +0.9[4] km/s |
| Proper motion (μ) | RA: −8.004[1] mas/yr Dec.: −18.202[1] mas/yr |
| Parallax (π) | 5.2607 ± 0.0577[1] mas |
| Distance | 620 ± 7 ly (190 ± 2 pc) |
| Absolute magnitude (MV) | +0.56[5] |
| Details | |
| Mass | 1.55[6] M☉ |
| Radius | 18.88+0.72 −0.95[1] R☉ |
| Luminosity | 139±2[1] L☉ |
| Temperature | 4,439±42[6] K |
| Age | 3.35[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Xi1 Capricorni, Latinized from ξ1 Capricorni, is an orange-hued star in the constellation Capricornus. With an apparent visual magnitude of +6.34,[2] it is near the lower limit of brightness for stars that can be seen with the naked eye. Based upon an annual parallax shift of 5.26 mas as seen from Earth,[1] this system is located roughly 620 light-years from the Sun.
It is an evolved K-type giant star with a stellar classification of K0 III.[3] With an age of 3.35 billion years, this star has an estimated 1.55[6] times the mass of the Sun and is radiating 139[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of about 4,439 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 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.
- ↑ 2.0 2.1 2.2 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode: 1968MNSSA..27...11C.
- ↑ 3.0 3.1 Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H.
- ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institution for Science, Bibcode: 1953GCRV..C......0W.
- ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 6.3 6.4 Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal 150 (3): 23, doi:10.1088/0004-6256/150/3/88, 88, Bibcode: 2015AJ....150...88L.
- ↑ "ksi01 Cap". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=ksi01+Cap.
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