GJ 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 mas[1] |
| Distance | approx. 59 ly (approx. 18 pc) |
| Absolute magnitude (MV) | 10.66[1] |
| Details | |
| Mass | 0.420[1] M☉ |
| Radius | 0.40 ± 0.03[1] R☉ |
| Luminosity | 0.022[1] L☉ |
| Temperature | 3466 ± 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 | |
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
| 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
- ^ a b c d e f g h i j k l 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. 575. Astronomy & Astrophysics: A119. arXiv:1411.7048v1. Bibcode:2015A&A...575A.119A. doi:10.1051/0004-6361/201424253.
- ^ a b c "Gliese 3293", Open Exoplanet Catalouge, MIT, retrieved 2016-08-11
- ^ a b "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
- ^ The Extrasolar Planets Encyclopaedia, exoplanet TEAM, retrieved 2016-08-11
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