GJ 3378 b
Orbiting GJ 3378
GJ 3378 b is an exoplanet orbiting the star GJ 3378, discovered in 2026 using the Radial Velocity method.
Minimum Mass (M sin i)
2.30
Earth masses
Orbital Period
21.4
days
Distance
7.7
parsecs
Equilibrium Temp
272
K
Radius (Earth radii)
Unknown
Minimum Mass, M sin(i) (Earth masses)
2.30
Radial-velocity minimum
Equilibrium Temperature
272 K
Parameter source: Robertson et al. 2026
Orbital Period
21.450+0.010−0.010days
Semi-Major Axis
0.0967+0.0008−0.0008au
M sin(i) (Earth masses)
2.30+0.40−0.40
M sin(i) (Jupiter masses)
0.0072+0.0013−0.0013
Eccentricity
0.0000
Radial Velocity Semi-Amplitude
1.30+0.20−0.20m/s
Distance from Earth
7.7 pc (~25 ly)
Spectral Type
M4 V
Temperature
3340 K
Mass (Solar)
0.26 M☉
Radius (Solar)
0.28 R☉
Luminosity
-2.07 log L☉
Planets in System
1
Stars in System
1
Coordinates (RA, Dec)
90.2951°, 59.5932°
Discovery Method
Radial Velocity
Discovery Year
2026
Source ID: GJ 3378 b
GJ 3378 b orbits GJ 3378 and was reported in 2026 and was detected with the Radial Velocity method.
Published measurements list a minimum mass of 2.3 Earth masses (M sin i), an orbital period of 21.45 days, and an equilibrium temperature near 272 K.
Catalog data places the system at about 7.7 parsecs from Earth, a host star classified as M4 V, and 1 known planet in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open GJ 3378