Astronomy:GJ 3293
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas/yr Dec.: −485.454[2] mas/yr |
| Parallax (π) | 49.4868 ± 0.0227[2] mas |
| 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 |
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]
Planetary system
In 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Astudillo-Defru, Nicola; Bonfils, Xavier; Delfosse, Xavier; Ségransan, Damien; Forveille, Thierry; Bouchy, François; Gillon, Michaël; Lovis, Christophe et al. (2015). "Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543". Astronomy & Astrophysics 575: A119. doi:10.1051/0004-6361/201424253. Bibcode: 2015A&A...575A.119A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
- ↑ 3.0 3.1 3.2 "Gliese 3293", Open Exoplanet Catalogue (MIT), http://www.openexoplanetcatalogue.com/planet/Gliese%203293%20b/, retrieved 2016-08-11
- ↑ Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D. et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics 616: A7. doi:10.1051/0004-6361/201832795. Bibcode: 2018A&A...616A...7S.
- ↑ 5.0 5.1 "GJ 3293 -- High proper-motion Star", SIMBAD (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=GJ%203293, retrieved 2011-12-08
- ↑ 6.0 6.1 6.2 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. doi:10.1051/0004-6361/201630153. Bibcode: 2017A&A...602A..88A. https://www.aanda.org/articles/aa/full_html/2017/06/aa30153-16/aa30153-16.html.
Coordinates: 
04h 28m 37.08s, −25° 10′ 25.6″
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