Gamma Leporis
Gamma Leporis, Latinized from γ Leporis, is a star in the south central part of the constellation Lepus, southeast of Beta Leporis and southwest of Delta Leporis. With an apparent visual magnitude of 3.587,[3] it is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 112.02 mas as seen from Earth, its distance can be estimated as 29 light years from the Sun. It has a common proper motion companion, AK Leporis, which is a variable star of the BY Draconis type and has an average brightness of magnitude 6.28.[12] The two are 95″ apart can be well seen in binoculars.[11] Gamma Leporis is a member of the Ursa Major Moving Group.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lepus |
| Right ascension | 05h 44m 27.79089s[1] |
| Declination | −22° 26′ 54.1808″[2] |
| Apparent magnitude (V) | 3.587[3] |
| Characteristics | |
| Spectral type | F6 V[4] |
| U−B color index | −0.007[3] |
| B−V color index | +0.494[3] |
| Astrometry | |
| Radial velocity (Rv) | −9.7[5] km/s |
| Proper motion (μ) | RA: −291.67[2] mas/yr Dec.: −368.97[2] mas/yr |
| Parallax (π) | 112.02 ± 0.18 mas[2] |
| Distance | 29.12 ± 0.05 ly (8.93 ± 0.01 pc) |
| Absolute magnitude (MV) | 3.84[6] |
| Details | |
| Mass | 1.23±0.05[7] M☉ |
| Radius | 1.33±0.04[7] R☉ |
| Luminosity (bolometric) | 2.291[8] L☉ |
| Surface gravity (log g) | 4.10[9] cgs |
| Temperature | 6,299[9] K |
| Metallicity [Fe/H] | −0.12[9] dex |
| Rotation | 5.91±0.66[8] |
| Rotational velocity (v sin i) | 15[10] km/s |
| Age | 1.3[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gamma Leporis is an F-type main-sequence star with a stellar classification of F6 V.[4] It is larger than the Sun with 1.2 times the radius of the Sun and 1.3 times the Sun's mass.[7] The star is around 1.3 billion years old[6] and is spinning with a rotation period of about six days.[8] Based upon its stellar characteristics and distance from Earth, Gamma Leporis was considered a high-priority target for NASA's Terrestrial Planet Finder mission. It has been examined for an infrared excess, but none has been observed.[8]
See also edit
References edit
- ^ van Leeuwen, F. (November 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 Perryman, M. A. C.; et al. (1997). "The Hipparcos Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P.
- ^ a b c d Gutierrez-Moreno, A.; et al. (1966). "A system of photometric standards". Publicaciones del Departamento de Astronomia de la Universidadde Chile. 1: 1. Bibcode:1966PDAUC...1....1G.
- ^ a b Montes, D.; et al. (November 2001). "Late-type members of young stellar kinematic groups - I. Single stars". Monthly Notices of the Royal Astronomical Society. 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode:2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. S2CID 55727428.
- ^ Evans, D. S. (June 20–24, 1966). "The Revision of the General Catalogue of Radial Velocities". In Batten, Alan Henry; Heard, John Frederick (eds.). Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30. University of Toronto: International Astronomical Union. Bibcode:1967IAUS...30...57E.
- ^ a b c Holmberg, J.; Nordström, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics Supplement Series. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. S2CID 118577511. Note: see VizieR catalogue V/130.
- ^ a b c d Ammler-von Eiff, M.; Guenther, E. W. (October 2009). "Spectroscopic properties of cool Ursa Major group members". Astronomy & Astrophysics. 508 (2): 677–693. arXiv:0910.5913. Bibcode:2009A&A...508..677A. doi:10.1051/0004-6361/200912660. S2CID 119260429.
- ^ a b c d Montesinos, B.; et al. (September 2016), "Incidence of debris discs around FGK stars in the solar neighbourhood", Astronomy & Astrophysics, 593: 31, arXiv:1605.05837, Bibcode:2016A&A...593A..51M, doi:10.1051/0004-6361/201628329, S2CID 55251562, A51.
- ^ a b c Gratton, R. G.; Carretta, E.; Castelli, F. (October 1996). "Abundances of light elements in metal-poor stars. I. Atmospheric parameters and a new T_eff_ scale". Astronomy and Astrophysics. 314: 191–203. arXiv:astro-ph/9603011. Bibcode:1996A&A...314..191G.
- ^ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.
- ^ a b "LTT 2364 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-01-16.
- ^ (PDF), archived from the original (PDF) on 2021-06-02, retrieved 2022-01-19
External links edit
- Overview on Gamma Leporis
- Stellar Database