Theta Gruis
Star in the constellation Grus
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Grus |
Right ascension | 23h 06m 52.73046s[1] |
Declination | −43° 31′ 13.2857″[1] |
Apparent magnitude (V) | 4.28[2] (4.51 + 6.84 + 7.80)[3] |
Characteristics | |
Spectral type | kF3VhF5mF5(II-III)[4] + ? + G2V[3] |
U−B color index | +0.16[2] |
B−V color index | +0.42[2] |
Astrometry | |
Radial velocity (Rv) | +9.6[5] km/s |
Proper motion (μ) | RA: −47.17[1] mas/yr Dec.: −13.49[1] mas/yr |
Parallax (π) | 24.73 ± 0.45 mas[1] |
Distance | 132 ± 2 ly (40.4 ± 0.7 pc) |
Absolute magnitude (MV) | +1.25[6] |
Details | |
θ Gru A | |
Luminosity | 27[6] L☉ |
Rotational velocity (v sin i) | 64[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Theta Gruis, Latinized from θ Gruis, is a triple star[3] system in the southern constellation of Grus. Its combined apparent visual magnitude is 4.28,[2] which is bright enough to be seen with the naked eye. The system contains a magnetic Delta Delphini-like[9] F5 star with a close fainter companion, plus a more distant G2 main sequence star.[3]
References
- ^ a b c d e 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, S2CID 18759600.
- ^ a b c d Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
- ^ a b c d 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, S2CID 14878976.
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ Gray, R. O.; Garrison, R. F. (1989), "The early F-type stars - Refined classification, confrontation with Stromgren photometry, and the effects of rotation", Astrophysical Journal Supplement Series, 69: 301, Bibcode:1989ApJS...69..301G, doi:10.1086/191315.
- ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W.
- ^ a b 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, S2CID 119257644.
- ^ Uesugi, Akira; Fukuda, Ichiro (1970), "Catalogue of rotational velocities of the stars", Contributions from the Institute of Astrophysics and Kwasan Observatory, University of Kyoto, Bibcode:1970crvs.book.....U.
- ^ "tet Gru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-26.
{{cite web}}
: CS1 maint: postscript (link) - ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
- v
- t
- e
Constellation of Grus
Bayer | |
---|---|
Variable | |
HR | |
HD | |
Other |
Exoplanets |
|
---|
NGC | |
---|---|
Other |
Galaxy clusters |
---|
![](http://upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png)