Gamma Volantis
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Volans |
| γ¹ Vol | |
| Right ascension | 07h 08m 42.38187s[1] |
| Declination | −70° 29′ 49.5073″[1] |
| Apparent magnitude (V) | 5.704[2] |
| γ² Vol | |
| Right ascension | 07h 08m 44.86718s[1] |
| Declination | −70° 29′ 56.1620″[1] |
| Apparent magnitude (V) | 3.62[3] |
| Characteristics | |
| Spectral type | F2V + K0III[4] |
| Astrometry | |
| γ¹ Vol | |
| Radial velocity (Rv) | −3[5] km/s |
| Proper motion (μ) | RA: +23.92[1] mas/yr Dec.: +107.19[1] mas/yr |
| Parallax (π) | 20.14 ± 1.64[1] mas |
| Distance | 160 ± 10 ly (50 ± 4 pc) |
| Absolute magnitude (MV) | 2.51[6] |
| γ² Vol | |
| Radial velocity (Rv) | +2.8[5] km/s |
| Proper motion (μ) | RA: +24.29[1] mas/yr Dec.: +107.03[1] mas/yr |
| Parallax (π) | 23.33 ± 0.92[1] mas |
| Distance | 140 ± 6 ly (43 ± 2 pc) |
| Details | |
| γ¹ Vol | |
| Temperature | 6,541[6] K |
| Metallicity [Fe/H] | +0.12[2] dex |
| Rotational velocity (v sin i) | 4.4±0.2[6] km/s |
| Age | 1.4[2] Gyr |
| γ² Vol | |
| Luminosity | 60[7] L☉ |
| Temperature | 5,044[7] K |
| Other designations | |
| γ¹ Vol: HD 55864, HIP 34473, HR 2735, SAO 256373[8] | |
| γ² Vol: HD 55865, HIP 34481, HR 2736, SAO 256374[9] | |
Gamma Volantis (γ Vol, γ Volantis) is a wide binary star[4] in the constellation Volans. Based upon parallax measurements, it is approximately 142 light years from Earth. It is bright enough to be seen with the naked eye and can be found around 9° to the east-southeast of the Large Magellanic Cloud.[10]
The brighter component, designated γ² Volantis, is an orange K-type giant star with a stellar classification of K0III and an apparent magnitude of +3.62. Its companion, γ¹ Volantis, is an F-type main-sequence star of classification F2V and an apparent magnitude of +5.70. As of 2002, the pair were at an angular separation of 14.1″ along a position angle of 296°. Their separation has decreased from 15.7″ in 1826.[11]
References
- 1 2 3 4 5 6 7 8 9 10 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 Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
- ↑ 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.
- 1 2 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.
- 1 2 Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- 1 2 3 Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: 31, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116.
- 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
- 1 2 "gam01 Vol -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-09-03.
- 1 2 "gam02 Vol -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-09-03.
- ↑ Bakich, Michael E. (2010), 1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers, The Patrick Moore Practical Astronomy Series, Springer Science & Business Media, p. 13, ISBN 1441917772.
- ↑ Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2016-09-04
External links
- Kaler, James B., "Gamma Volantis", Stars, University of Illinois, retrieved 2016-09-04.
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