20 Ceti
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 00h 53m 00.49452s[1] |
| Declination | −01° 08′ 39.3317″[1] |
| Apparent magnitude (V) | 4.76[2] |
| Characteristics | |
| Spectral type | M0III[3] |
| U−B color index | +1.91[4] |
| B−V color index | +1.56[4] |
| Astrometry | |
| Radial velocity (Rv) | 16.22 ± 0.28[5] km/s |
| Proper motion (μ) | RA: 6.99[1] mas/yr Dec.: -15.66[1] mas/yr |
| Parallax (π) | 5.56 ± 0.22 mas[1] |
| Distance | 590 ± 20 ly (180 ± 7 pc) |
| Absolute magnitude (MV) | -1.58[3] |
| Details | |
| Radius | 53[6] R☉ |
| Luminosity | 1044 ± 25[3] L☉ |
| Temperature | 3800[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
20 Ceti (20 Cet) is an red giant star in the constellation Cetus. Its apparent magnitude is 4.76.[2]
References
- ^ a b c d e van Leeuwen, F.; et al. (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.
- ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ a b c d Groenewegen, M. A. T. (2012). "Infrared excess around nearby red giant branch stars and Reimers law". Astronomy & Astrophysics. 540: A32. Bibcode:2012A&A...540A..32G. doi:10.1051/0004-6361/201118287.
- ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
- ^ Famaey, B.; Pourbaix, D.; Frankowski, A.; Van Eck, S.; Mayor, M.; Udry, S.; Jorissen, A. (2009). "Spectroscopic binaries among Hipparcos M giants". Astronomy and Astrophysics. 498 (2): 627. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698.
- ^ Wesselink, A. J.; Paranya, K.; DeVorkin, K. (1972). "Catalogue of stellar dimensions". Astronomy and Astrophysics Supplement. 7: 257. Bibcode:1972A&AS....7..257W.
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