Gamma Leporis, Latinized from γ Leporis, is a star in the southern half of the constellation Lepus, southeast of Beta Leporis and southwest of Delta Leporis. With an apparent visual magnitude of 3.587,[2] it is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 112.3 mas as seen from Earth, its distance can be calculated as 29 light-years from the Sun. It has a common proper motion companion, AK Leporis (or Gamma Leporis B), which is a variable star of the BY Draconis type and has an average brightness of magnitude 6.28.[10] The two are 95″ apart can be well seen in binoculars.[9] Gamma Leporis is a member of the Ursa Major Moving Group.[5]

Gamma Leporis is an F-type main-sequence star with a stellar classification of F6 V.[3] It is larger than the Sun with 1.2 times the radius of the Sun and 1.3 times the Sun's mass.[5] The star is around 1.3 billion years old[4] and is spinning with a rotation period of about six days.[6] 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.[6]

Van Biesbroeck's star catalog of 1961 lists the red dwarf star VB 1 as a companion of Gamma Leporis,[11] but this is a background star that is not physically associated.[12] It should not be confused with AK Leporis (Gamma Leporis B), which is a true companion star.[13][14]

See also

References

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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.
  8. ^ 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.
  9. ^ a b "LTT 2364 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2011-01-16.
  10. ^ "STERNBILD HASE" (PDF). Archived from the original (PDF) on 2021-06-02. Retrieved 2022-01-19.
  11. ^ van Biesbroeck, G. (November 1961). "A search for Stars of Low Luminosity". The Astronomical Journal. 66 (9): 528–530. Bibcode:1961AJ.....66..528V. doi:10.1086/108457.
  12. ^ "VB 1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 March 2025.
  13. ^ Kaler, James B. "Gamma Leporis". Stars. University of Illinois. Retrieved 2015-04-02.
  14. ^ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics. 650: A201. arXiv:2104.14972. Bibcode:2021A&A...650A.201R. doi:10.1051/0004-6361/202140985. S2CID 233476431. Data available at https://gruze.org/10pc/ Archived 12 March 2023 at the Wayback Machine
Allikas: http://en.wikipedia.org/wiki/Gamma_Leporis
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