Astronomy:Gamma Leporis

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Short description: Star in the constellation Lepus
γ Leporis
Location of γ Leporis (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Lepus
Right ascension  05h 44m 27.79062s[1]
Declination −22° 26′ 54.1878″[1]
Apparent magnitude (V) 3.587[2]
Characteristics
Spectral type F6 V[3]
U−B color index −0.007[2]
B−V color index +0.494[2]
Astrometry
Radial velocity (Rv)−8.99±0.15[1] km/s
Proper motion (μ) RA: −291.757[1] mas/yr
Dec.: −368.521[1] mas/yr
Parallax (π)112.2960 ± 0.1452[1] mas
Distance29.04 ± 0.04 ly
(8.91 ± 0.01 pc)
Absolute magnitude (MV)3.84[4]
Details
Mass1.17+0.10
−0.06[5] M☉
Radius1.30±0.03[5] R☉
Luminosity (bolometric)2.36+0.13
−0.14[5] L☉
Surface gravity (log g)4.350±0.040[5] cgs
Temperature6,276+57
−61[5] K
Metallicity [Fe/H]−0.12[6] dex
Rotation5.91±0.66[7] days
Rotational velocity (v sin i)15[8] km/s
Age1.3[4] Gyr
Other designations
γ Lep, 13 Leporis, BD−22°1211, CD−22°2438, FK5 217, GJ 216 A, HD 38393, HIP 27072, HR 1983, SAO 170759[9]
Database references
SIMBADdata

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 29.04 light-years. 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.[11]

Gamma Leporis is an F-type main-sequence star with a stellar classification of F6 V.[3] It is larger than the Sun with 1.30 times the radius of the Sun and 1.17 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.[7] 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.[7]

Van Biesbroeck's star catalog of 1961 lists the red dwarf star VB 1 as a companion of Gamma Leporis,[12] but this is a background star that is not physically associated.[13] It should not be confused with AK Leporis (Gamma Leporis B), which is a true companion star.[14][15]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Gutierrez-Moreno, A. (1966). "A system of photometric standards". Publicaciones del Departamento de Astronomia de la Universidadde Chile 1: 1. Bibcode: 1966PDAUC...1....1G. 
  3. ↑ 3.0 3.1 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. doi:10.1046/j.1365-8711.2001.04781.x. Bibcode: 2001MNRAS.328...45M. 
  4. ↑ 4.0 4.1 4.2 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. doi:10.1051/0004-6361/200811191. Bibcode: 2009A&A...501..941H.  Note: see VizieR catalogue V/130.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Harada, Caleb K. et al. (June 2024). "Setting the Stage for the Search for Life with the Habitable Worlds Observatory: Properties of 164 Promising Planet-survey Targets". The Astrophysical Journal Supplement Series 272 (2): id. 30. doi:10.3847/1538-4365/ad3e81. Bibcode: 2024ApJS..272...30H. 
  6. ↑ 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. Bibcode: 1996A&A...314..191G. 
  7. ↑ 7.0 7.1 7.2 Montesinos, B. et al. (September 2016). "Incidence of debris discs around FGK stars in the solar neighbourhood". Astronomy & Astrophysics 593: 31. doi:10.1051/0004-6361/201628329. A51. Bibcode: 2016A&A...593A..51M. 
  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. ↑ 9.0 9.1 "LTT 2364 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LTT+2364. 
  10. ↑ "STERNBILD HASE". http://pegasus-wolfenbuettel.de/phocadownload/SB_Hase.pdf. 
  11. ↑ Ammler-von Eiff, M.; Guenther, E. W. (October 2009). "Spectroscopic properties of cool Ursa Major group members". Astronomy & Astrophysics 508 (2): 677–693. doi:10.1051/0004-6361/200912660. Bibcode: 2009A&A...508..677A. 
  12. ↑ van Biesbroeck, G. (November 1961). "A search for Stars of Low Luminosity". The Astronomical Journal 66 (9): 528–530. doi:10.1086/108457. Bibcode: 1961AJ.....66..528V. 
  13. ↑ "VB 1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=VB+1. 
  14. ↑ Kaler, James B.. "Gamma Leporis". Stars. University of Illinois. http://stars.astro.illinois.edu/sow/gammalep.html. Retrieved 2015-04-02. 
  15. ↑ 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. doi:10.1051/0004-6361/202140985. Bibcode: 2021A&A...650A.201R.  Data available at https://gruze.org/10pc/



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