Rho Gruis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Grus |
| Right ascension | 22h 43m 29.97654s[1] |
| Declination | −41° 24′ 51.6467″[1] |
| Apparent magnitude (V) | 4.847[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +0.807[4] |
| B−V color index | +1.026[4] |
| Astrometry | |
| Proper motion (μ) | RA: +10.11[1] mas/yr Dec.: −93.79[1] mas/yr |
| Parallax (π) | 14.16 ± 0.19 mas[1] |
| Distance | 230 ± 3 ly (70.6 ± 0.9 pc) |
| Absolute magnitude (MV) | 0.685[2] |
| Details | |
| Mass | 1.91[2] M☉ |
| Surface gravity (log g) | 2.62[2] cgs |
| Temperature | 4,737[2] K |
| Metallicity [Fe/H] | −0.20[2] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Rho Gruis (ρ Gruis) is a solitary[6] star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 4.85.[2] Based upon an annual parallax shift of 14.16 mas as seen from the Earth,[1] the system is located about 230 light years from the Sun. Rho Gruis is an evolved K-type giant star with a stellar classification of K0 III.[3] With 1.9 times the mass of the Sun[2] it is a red clump star,[2] which indicates it is generating energy through helium fusion at its core.
References
- ^ 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.
- ^ a b c d e f g h i Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society, 382 (2): 553–66, Bibcode:2007MNRAS.382..553L, doi:10.1111/j.1365-2966.2007.11852.x.
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ a b Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b Cousins, A. W. J. (1983), "UBV photometry of E region standard stars of intermediate brightness", South African Astronomical Observatory Circular (7): 36–46, Bibcode:1983SAAOC...7...36C.
- ^ "* rho Gru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-24.
{{cite web}}: CS1 maint: postscript (link) - ^ 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.
{{citation}}: CS1 maint: unflagged free DOI (link)
