Planet GJ 338 Bb

Detailed information about planet GJ 338 Bb and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
GJ 338 Bb
Planet Status
Confirmed
Discovered in
2020
Update
2024-07-28
Mass
0.0327 ( ± 0.0038 ) MJ
Mass*sin(i)
0.0327 ( ± 0.0038 ) MJ
Semi-Major Axis
0.142 ( ± 0.005 ) AU
Orbital Period
24.435 ( +0.011 -0.02 ) day
Eccentricity
0.097 ( +0.096 -0.067 )
ω
204.3 ( +94.4 -70.0 ) deg
Tperi
2457521.34 ( +0.66 -0.83 ) JD
Radius
—
Inclination
—
Detection Method
Radial Velocity
Mass Meas. Method
Radial Velocity
Radius Meas. Method
—
Primary transit
—
Secondary transit
—
λ
—
Impact Parameter b
—
Time Vr=0
—
Velocity Semiamplitude K
3.14 ( ± 0.27 ) m/s
Calculated temperature
—
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
HD 79211 b, STF 1321 Bb
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

See also Planets in Binaries webpage.

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Star

Name
GJ 338 B
Distance
6.334 ( ± 0.002 ) pc
Spectral type
M0V
Apparent magnitude V
—
Mass
0.64 ( ± 0.07 ) MSun
Age
4.0 ( ± 3.0 ) Gyr
Effective temperature
4005.0 ( ± 51.0 ) K
Radius
0.58 ( ± 0.03 ) RSun
Metallicity [Fe/H]
-0.03 ( ± 0.16 )
Detected Disc
—
Magnetic Field
—
RA2000
09:14:24.7
Dec2000
+52:41:10.9
Alternate Names
HD 79211, STF 1321 B

González-Álvarez et al. (2020): GJ 338 is a binary. The separation between the two very similar stars, GJ 338A and GJ 338B, is 108.54 AUs. The 10 mE planet orbits GJ 338B (HD 79211).

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