GJ 3293 - Misplaced Pages

Star in the constellation Eridanus

GJ 3293
Observation data Epoch J2000 Equinox J2000
Constellation	Eridanus
Right ascension	04 28 35.71911
Declination	−25° 10′ 09.2979″
Apparent magnitude (V)	11.96
Characteristics
Spectral type	M2.5
Astrometry

Radial velocity (R_v)	13.116 ± 0.0024 km/s
Proper motion (μ)	RA: −81.375 mas/yr Dec.: −485.454 mas/yr
Parallax (π)	49.4868 ± 0.0227 mas
Distance	65.91 ± 0.03 ly (20.207 ± 0.009 pc)
Absolute magnitude (M_V)	10.66

Details

Mass	0.420 `M`_☉
Radius	0.40 ± 0.03 `R`_☉
Luminosity	0.022 `L`_☉
Temperature	3466 ± 49 K
Metallicity	0.02 ± 0.09 dex
Rotational velocity (v sin i)	−25.9 ± 6.6 km/s

Other designations
GJ 3293, LHS 1672, 2MASS J04283571-2510088, Gaia DR2 4893118771316702720
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 04 28 35.71911, Declination −25° 10′ 09.2979″. With an apparent visual magnitude of 11.96, 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. GJ 3293 is significantly smaller and cooler than the Sun.

Planetary system

In 2015, it was discovered that GJ 3293 possessed two planets, and in 2017 an additional two planets were discovered, making a total of four. Two of these planets are located within the habitable zone: GJ 3293b and GJ 3293d.

The GJ 3293 planetary system
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

^ 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.
^ 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.
^ "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.
^ "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
^ 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.

Constellation of Eridanus

Stars

Bayer	α (Achernar) β (Cursa) γ (Zaurak) δ (Rana) ε (Ran) ζ (Zibal) η (Azha) θ (Acamar) θ ι κ λ μ ν ξ ο (Beid) ο (40, Keid) π ρ ρ ρ τ τ (Angetenar) τ τ τ τ τ τ τ υ υ (Theemin) υ (Beemim) υ φ χ ψ ω
Flamsteed	14 15 17 (v) 39 (A) 45 51 (c) 53 (Sceptrum) 54 58 64 66
Variable	DO DZ EF EK EM (d) EP KT
HR	486 (p) 487 (p) 506 (q) 789 (s) 859 1008 (e) 1106 (y) 1143 (h) 1189 (f) 1190 (f) 1195 (g) 1483 1536 1614
HD	18742 (Ayeyarwady) 19467 28185 30562 30856 (Mouhoun) 30963
Other	2MASS J04151954−0935066 DENIS 0255−4700 Gliese 86 Gliese 180 GJ 1062 GJ 3293 GJ 3323 HIP 12961 (Koeia) LTT 1445 LP 890-9 Mothra WASP-22 (Tojil) WASP-35 WASP-50 (Chaophraya) WASP-78 WASP-79 (Montuno) WISE J0336−0143

Exoplanets	51 Eridani b ε Eridani b (AEgir) Gliese 86 b HD 10647 b HD 18742 b (Bagan) HD 28185 b HD 30562 b HD 30856 Ab (Nakanbé) WASP-79b (Pollera)

Nebulae

NGC	1535

Galaxies

NGC	782 852 939 1084 1132 1140 1154 1155 1157 1158 1172 1187 1189 1190 1191 1192 1199 1222 1232 1234 1241 1253 1262 1266 1269 1291 1300 1309 1325 1332 1337 1345 1347 1353 1357 1369 1386 1395 1400 1403 1404 1407 1426 1427A 1436 1437 1439 1452 1460 1487 1531 1532 1592 1600 1614 1637 1721 1723 1725 1728 1741
Other	Eridanus II ESO 198-13 ESO 0313-192 IC 1953 IC 2006 LEDA 74886 MRC 0406-244 PKS 0208-512 PKS 0405–385 PKS 0420-014 UGC 2812

Galaxy clusters	Abell 383 Eridanus Cluster Eridanus Group MACS J0416.1-2403

Astronomical events	GRB 080913 HE0435-1223