Planet K2-138 d

Detailed information about planet K2-138 d and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
K2-138 d
Planet Status
Confirmed
Discovered in
2017
Update
2021-03-26
Mass
0.0249 ( ± 0.0044 ) MJ
Mass*sin(i)
—
Semi-Major Axis
0.05883 ( +0.00042 -0.00042 ) AU
Orbital Period
5.40478 ( +0.00048 -0.00046 ) day
Eccentricity
0.348 ( +0.0 -0.348 )
ω
83.0 ( +82.0 -38.0 ) deg
Tperi
—
Radius
0.237 ( +0.035 -0.016 ) RJ
Inclination
87.9 ( +1.5 -2.8 ) deg
Detection Method
Primary Transit
Mass Meas. Method
Spectrum
Radius Meas. Method
Primary Transit
Primary transit
2457743.1607 JD
Secondary transit
—
λ
—
Impact Parameter b
0.47 ( +0.31 -0.32 )
Time Vr=0
—
Velocity Semiamplitude K
3.0 ( ± 0.5 ) m/s
Calculated temperature
992.0 ( ± 18.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
2MASS J23154776-1050590 d, EPIC 245950175 d, WISE J231547.76-105059.0 d
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

February 2018 : K2-138 is the first exoplanet discovery by citizen scientists participating in the Exoplanet Explorers project on the Zooniverse platform.

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Star

Name
K2-138
Distance
183.0 ( ± 17.0 ) pc
Spectral type
K1 V
Apparent magnitude V
12.21
Mass
0.93 ( ± 0.06 ) MSun
Age
—
Effective temperature
5378.0 ( ± 60.0 ) K
Radius
0.86 ( ± 0.08 ) RSun
Metallicity [Fe/H]
0.16 ( ± 0.04 )
Detected Disc
—
Magnetic Field
—
RA2000
23:15:47.8
Dec2000
-10:50:58.9
Alternate Names
EPIC 245950175, 2MASS J23154776-1050590, WISE J231547.76-105059.0

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