Gamma Hydri
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Hydrus |
| Right ascension | 03h 47m 14.34s[1] |
| Declination | −74° 14′ 20.3″[1] |
| Apparent magnitude (V) | 3.26[2] |
| Spectral type | M2III[3] |
Gamma Hydri is a star in the constellation Hydrus. Located around 65.61 parsecs (214.0 ly) distant,[1] it is an red giant of spectral type M2III,[3] a star that has used up its core hydrogen and has expanded. A semiregular variable, it pulsates between magnitudes 3.26 and 3.33, although its period is not yet known precisely.[4]
References
- 1 2 3 van Leeuwen, F. (November 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.
- ↑ 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: 0. Bibcode:2002yCat.2237....0D.
- 1 2 "Gamma Hydri". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 12 July 2015.
- ↑ Tabur, V.; Bedding, T. R.; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (2009). "Long-term Photometry and Periods for 261 Nearby Pulsating M Giants". Monthly Notices of the Royal Astronomical Society 400 (4): 1945–61. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
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