Gliese 3293

Gliese 3293
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus[1]
Right ascension 04h 28m 35.72s
Declination −25° 10′ 08.9″
Apparent magnitude (V) 11.96[2]
Characteristics
Spectral type M2.5[2]
Astrometry
Parallax (π)55 ± 9[1] mas
Distanceapprox. 59 ly
(approx. 18 pc)
Absolute magnitude (MV)10.66[1]
Details
Mass0.420[1] M☉
Radius0.40 ± 0.03[1] R☉
Luminosity0.022[1] L☉
Temperature3466 ± 49[1] K
Metallicity [Fe/H]0.02 ± 0.09[1] dex
Rotational velocity (v sin i)−25.9 ± 6.6[1] km/s
Other designations
GJ 3293,[2] LHS 1672[3]

Gliese 3293 is a star in the constellation of Eridanus, that is orbited by three planets, one of which (Gliese 3293c) is located within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 04h 28m 35.72s, Declination −25° 10′ 08.9″.[1] With an apparent visual magnitude of 11.96,[3] this star is too faint to be seen with the naked eye. It can be viewed with a telescope having an aperture of at least 4 in (10 cm). The estimated distance to Gliese 3293 is 59 light-years (18 parsecs).[1] Gliese 3293 is significantly smaller and cooler than the Sun.[1]

Planetary system

On November 27, 2014, it was discovered that Gliese 3293 possessed three planets, one of which was located well within the habitable zone. Gliese 3293c is

The Gliese 3293 planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.0812 MJ 0.1434 30.6 — — —
c 0.027 MJ 0.1939 48.14 ± 0.12 — — —
d 0.0705 MJ 0.364 123.98 — — —

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 Astudillo-Defru, N.; Bonfils, X.; Delfosse, X.; Ségransan, D.; Forveille, T.; Bouchy, F.; Gillon, M.; Lovis, C.; Mayor, M.; Neves, V.; Pepe, F.; Perrier, C.; Queloz, D.; Rojo, P.; Santos, N. C.; Udry, S. (2015). "Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543". Astronomy & Astrophysics. Astronomy & Astrophysics. 575: A119. arXiv:1411.7048v1Freely accessible. Bibcode:2015A&A...575A.119A. doi:10.1051/0004-6361/201424253.
  2. 1 2 3 "Gliese 3293", Open Exoplanet Catalouge, MIT, retrieved 2016-08-11
  3. 1 2 "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
  4. ↑ The Extrasolar Planets Encyclopaedia, exoplanet TEAM, retrieved 2016-08-11

Coordinates: 04h 28m 37.08s, −25° 10′ 25.6″


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