Phi1 Hydrae
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Hydra |
Right ascension | 10h 32m 41.16026s[1] |
Declination | −16° 57′ 31.4110″[1] |
Apparent magnitude (V) | 7.61[2] |
Characteristics | |
Spectral type | G2 V[3] |
Astrometry | |
Radial velocity (Rv) | ±0.3 +15.8[4] km/s |
Proper motion (μ) | RA: −20.09[1] mas/yr Dec.: −86.78[1] mas/yr |
Parallax (π) | 13.63 ± 0.79[1] mas |
Distance | 240 ± 10 ly (73 ± 4 pc) |
Absolute magnitude (MV) | +3.30[5] |
Details[6] | |
Mass | 1.34 M☉ |
Luminosity | 4.4[5] L☉ |
Surface gravity (log g) | ±0.08 3.90 cgs |
Temperature | ±50 5,992 K |
Metallicity [Fe/H] | ±0.05 +0.15 dex |
Age | 4.1 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Phi1 Hydrae, Latinized from φ1 Hydrae, is a yellow-hued star in the constellation Hydra. Its apparent magnitude is 7.61,[2] making it too faint to be seen with the naked eye. Based upon an annual parallax shift of 13.63 mas as seen from Earth,[1] it is located about 240 light years from the Sun. This is an ordinary G-type main-sequence star, having a Sun-like stellar classification of G2 V.[3] However, the mass is 34%[6] greater than the Sun, and it is radiating 4.4 times the Sun's luminosity.[5] Phi1 Hydrae is moving further from the Sun with a radial velocity of +15.8 km/s.[4]
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 Høg, E.; et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27, Bibcode:2000A&A...355L..27H.
- 1 2 Houk, N.; Smith-Moore, M. (1988), "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars", Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Ann Arbor, MI, USA: Department of Astronomy, University of Michigan, 4, Bibcode:1988mcts.book.....H.
- 1 2 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
- 1 2 3 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 Bensby, T.; et al. (2014), "Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", Astronomy & Astrophysics, 562 (A71): 28, arXiv:1309.2631, Bibcode:2014A&A...562A..71B, doi:10.1051/0004-6361/201322631.
- ↑ "43 Hya". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-01-09.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.