Wikipedia
Zeta Caeli
Zeta Caeli, Latinized from ζ Caeli, is an orange-hued star in the constellation Caelum with a visual magnitude of +6.36.[2] It is an evolved K-type giant star and a member of the Milky Way's thick disk population.[8] Based upon an annual parallax shift of 7.59 mas as seen from Earth,[1] this star is located about 430 light years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Caelum |
| Right ascension | 04h 47m 49.57719s[1] |
| Declination | −30° 01′ 13.3391″[1] |
| Apparent magnitude (V) | +6.36[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| B−V color index | +1.06[2] |
| Astrometry | |
| Radial velocity (Rv) | +6.7±1.0[4] km/s |
| Proper motion (μ) | RA: +28.93[1] mas/yr Dec.: +92.67[1] mas/yr |
| Parallax (π) | 7.59 ± 0.36 mas[1] |
| Distance | 430 ± 20 ly (132 ± 6 pc) |
| Absolute magnitude (MV) | +0.76[5] |
| Details | |
| Radius | 4.2[6] R☉ |
| Luminosity | 62[7] L☉ |
| Surface gravity (log g) | 2.39[8] cgs |
| Temperature | 4,620[8] K |
| Metallicity [Fe/H] | −0.22[8] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
References edit
- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c Cousins, A. W. J.; et al. (1966), "Photoelectric magnitudes and colours of southern stars, II", Royal Observatory Bulletins, 121: 1, Bibcode:1966RGOB..121....1C.
- ^ Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ 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.
- ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b c d Meléndez, J.; et al. (June 2008), "Chemical similarities between Galactic bulge and local thick disk red giant stars", Astronomy and Astrophysics, 484 (3): L21–L25, arXiv:0804.4124, Bibcode:2008A&A...484L..21M, doi:10.1051/0004-6361:200809398, S2CID 3201679.
- ^ "zet Cae". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-09-09.
External links edit
- HR 1539
- Image Zeta Caeli