Planet K2-138 b

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

Planet parameters Publications Observability Predictor

Planet

Name
K2-138 b
Planet Status
Confirmed
Discovered in
2017
Mass
0.0098 MJ
Mass*sin(i)
—
Semi-Major Axis
0.0338 AU
Orbital Period
2.35322 day
Eccentricity
0.403 ( -0.403 +0.0 )
ω
244.0 deg
Tperi
—
Radius
0.14 RJ
Inclination
86.9 deg
Update
2021-03-26
Detection Method
Primary Transit
Mass Detection Method
Spectrum
Radius Detection Method
Primary Transit
Primary transit
2457773.31683 JD
Secondary transit
—
λ
—
Impact Parameter b
0.5 ( -0.34 +0.33 )
Time Vr=0
—
Velocity Semiamplitude K
1.56 m/s
Calculated temperature
1308.0 K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
2MASS J23154776-1050590 b, EPIC 245950175 b, WISE J231547.76-105059.0 b
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 pc
Spectral type
K1 V
Apparent magnitude V
12.21
Mass
0.93 MSun
Age
—
Effective temperature
5378.0 K
Radius
0.86 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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