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 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 3293 is a star in the constellation of Eridanus, that is orbited by four planets, two of which (Gliese 3293b/Gliese 3293d) are 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 15, 2017, it was discovered that Gliese 3293 possessed four planets, two of which were located well within the habitable zone: Gliese 3293b and Gliese 3293d.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| e | 3.28±064 M🜨 | 0.08208 | 13.2543 | 0.21 | — | — |
| b | 23.54 M🜨 | 0.1434 | 30.6 | 0.06±0.04 | — | — |
| d | 7.60±1.05 M🜨 | 0.1939 | 48.14±0.12 | 0.12 | — | — |
| c | 21.09 M🜨 | 0.364 | 123.98 | 0.11 | — | — |
References
- ^ a b c d e f g h i j k l Astudillo-Defru, Nicola; Bonfils, Xavier; Delfosse, Xavier; Ségransan, Damien; Forveille, Thierry; Bouchy, François; Gillon, Michaël; Lovis, Christophe; Mayor, Michel; Neves, Vasco; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Rojo, Patricio; Santos, Nuno C.; Udry, Stéphane (2015). "Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543". Astronomy & Astrophysics. 575: A119. arXiv:1411.7048v1. Bibcode:2015A&A...575A.119A. doi:10.1051/0004-6361/201424253. S2CID 67754095.
- ^ a b c "Gliese 3293", Open Exoplanet Catalogue, MIT, retrieved 2016-08-11
- ^ a b "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
- ^ a b Astudillo-Defru, Nicola; Forveille, Thierry; Bonfils, Xavier; Ségransan, Damien; Bouchy, François; Delfosse, Xavier; et al. (2017). "The HARPS search for southern extra-solar planets. XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293". Astronomy and Astrophysics. 602. A88. arXiv:1703.05386. Bibcode:2017A&A...602A..88A. doi:10.1051/0004-6361/201630153. S2CID 119418595.
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