Nu Gruis
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Grus |
Right ascension | 22h 28m 29.21012s[1] |
Declination | −39° 07′ 54.4477″[1] |
Apparent magnitude (V) | 5.47[2] |
Characteristics | |
Spectral type | G9 III[3] |
B−V color index | +0.95[2] |
Astrometry | |
Radial velocity (Rv) | +10.6[4] km/s |
Proper motion (μ) | RA: +37.43[1] mas/yr Dec.: −160.51[1] mas/yr |
Parallax (π) | 11.44 ± 0.29[1] mas |
Distance | 285 ± 7 ly (87 ± 2 pc) |
Absolute magnitude (MV) | +0.76[5] |
Details | |
Luminosity | 57[5] L☉ |
Surface gravity (log g) | ±0.08 2.63[6] cgs |
Temperature | ±24 4,893[6] K |
Metallicity [Fe/H] | ±0.02 −0.41[6] dex |
Other designations | |
Database references | |
SIMBAD | data |
ν Gruis, Latinised as Nu Gruis, is a solitary,[8] yellow-hued star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 5.47.[2] The distance to this star, as determined using an annual parallax shift of 11.44 mas as seen from the Earth,[1] is 285 light years. This is an evolved G-type giant star with a stellar classification of G9 III,[3] a star that has used up its core hydrogen and has expanded. It has a visual magnitude 12.50 companion, not visible even through binoculars, located at an angular separation of 21.70 arc seconds along a position angle of 74°, as of 2011.[9]
References
- 1 2 3 4 5 6 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.
- 1 2 3 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
- ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W.
- 1 2 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.
- 1 2 3 Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189.
- ↑ "nu. Gru -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-26.
- ↑ 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.
- ↑ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
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