GJ 3293

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^h 28^m 35.71911^s, 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]

GJ 3293

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
GJ 3293,[3] LHS 1672,[5] 2MASS J04283571-2510088, Gaia DR2 4893118771316702720
Database references
SIMBAD	data
ARICNS	data

Planetary system

Hypothetical view of GJ 3293 b.

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]

The GJ 3293 planetary system^[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	—	—