Zeta Gruis
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Grus |
Right ascension | 23h 00m 52.81281s[1] |
Declination | −52° 45′ 14.8808″[1] |
Apparent magnitude (V) | 4.12[2] |
Characteristics | |
Spectral type | K1 III Fe−1.2 CN−0.5[3] |
U−B color index | +0.722[2] |
B−V color index | +0.967[2] |
Astrometry | |
Radial velocity (Rv) | ±2.7 −1.1[4] km/s |
Proper motion (μ) | RA: −63.96[1] mas/yr Dec.: −11.53[1] mas/yr |
Parallax (π) | 29.96 ± 0.83[1] mas |
Distance | 109 ± 3 ly (33.4 ± 0.9 pc) |
Absolute magnitude (MV) | +1.49[5] |
Details | |
Luminosity | 30[5] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
Zeta Gruis, Latinized from ζ Gruis, is a solitary,[7] orange-hued star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 4.12.[2] Based upon an annual parallax shift of 29.96 mas as seen from the Earth,[1] the system is located about 109 light years from the Sun. This is an evolved K-type giant star with a stellar classification of K1 III Fe−1.2 CN−0.5,[3] where the suffix notation indicates abnormally low abundances of iron and cyanogen in the spectrum.
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 4 Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", Monthly Notices of the Royal Astronomical Society, 172: 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667.
- 1 2 Gray, R. O.; et al. (2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–70, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- ↑ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
- 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.
- ↑ "zet Gru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-28.
- ↑ 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.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.