GJ 3293 (sometimes Gliese 3293) is a star in the constellation of Eridanus, that is orbited by four planets, two of which (GJ 3293b & GJ 3293d) are located within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 04h 28m 35.71911s, Declination −25° 10′ 09.2979″.[2] With an apparent visual magnitude of 11.96,[5] 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 GJ 3293 is 65.9 light-years (20.2 parsecs), based on its stellar parallax.[2] GJ 3293 is significantly smaller and cooler than the Sun.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus[1] |
| Right ascension | 04h 28m 35.71911s[2] |
| Declination | −25° 10′ 09.2979″[2] |
| Apparent magnitude (V) | 11.96[3] |
| Characteristics | |
| Spectral type | M2.5[3] |
| Astrometry | |
| Radial velocity (Rv) | 13.116 ± 0.0024[4] km/s |
| Proper motion (μ) | RA: −81.375 mas/yr[2] Dec.: −485.454 mas/yr[2] |
| Parallax (π) | 49.4868 ± 0.0227 mas[2] |
| Distance | 65.91 ± 0.03 ly (20.207 ± 0.009 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 |
Planetary system
editIn 2015, it was discovered that GJ 3293 possessed two planets,[1] and in 2017 an additional two planets were discovered, making a total of four.[6] Two of these planets are located within the habitable zone: GJ 3293b and GJ 3293d.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| e | ≥3.28±0.64 M🜨 | 0.08208+0.00003 −0.00004 |
13.2543+0.0078 −0.0104 |
0.21+0.20 −0.14 |
— | — |
| b | ≥23.54+0.88 −0.89 M🜨 |
0.14339±0.00003 | 30.5987+0.0083 −0.0084 |
0.06±0.04 | — | — |
| d | ≥7.60±1.05 M🜨 | 0.19394+0.00017 −0.00018 |
48.1345+0.0628 −0.0661 |
0.12+0.13 −0.09 |
— | — |
| c | ≥21.09+1.24 −1.26 M🜨 |
0.36175+0.00048 −0.00047 |
122.6196+0.2429 −0.2371 |
0.11+0.10 −0.08 |
— | — |
References
edit- ^ a b c d e f g h i j 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 d e f 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.
- ^ a b c "Gliese 3293", Open Exoplanet Catalogue, MIT, retrieved 2016-08-11
- ^ Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D.; Le Campion, J. -F.; Marchal, O.; Hestroffer, D.; Thévenin, F.; Crifo, F.; Udry, S.; Cropper, M.; Seabroke, G.; Viala, Y.; Benson, K.; Blomme, R.; Jean-Antoine, A.; Huckle, H.; Smith, M.; Baker, S. G.; Damerdji, Y.; Dolding, C.; Frémat, Y.; Gosset, E.; Guerrier, A.; Guy, L. P.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 247759802.
- ^ a b "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
- ^ a b c 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.
 | This article about a red dwarf is a stub. You can help Wikipedia by expanding it. |