Planet K2-237 Ab

Detailed information about planet K2-237 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
K2-237 Ab
Planet Status
Confirmed
Discovered in
2018
Publication
Status
—
Update
2025-09-04
Mass
1.236 ( +0.044 -0.044 ) MJ
Mass*sin(i)
—
Semi-Major Axis
0.0353 ( +0.0012 -0.0012 ) AU
Orbital Period
2.1805577 ( +5.7e-06 -5.7e-06 ) day
Eccentricity
0.0
Angular distance
—
ω
90.0 deg
Tperi
—
Radius
1.642 ( +0.05 -0.05 ) RJ
Inclination
84.6 ( +0.3 -0.3 ) deg
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
2457684.8101 ( ± 0.0001 ) JD
Secondary transit
—
λ
—
Impact Parameter b
0.52 ( +0.057 -0.002 )
Time Vr=0
—
Velocity Semiamplitude K
167.9 ( +4.7 -3.1 ) m/s
Calculated temperature
1838.0 ( +38.0 -38.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
EPIC 229426032 b, WISE J165504.52-284238.0 b, TOI-1049.01, 2MASS J16550453-2842380 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

K2-237 b is annouced almost simultaneously by Soto et al. (2018) et Smith et al. (2018).
See also Planets in Binaries webpage.

No link

Star

Name
K2-237 A
Distance
315.0 ( +7.22 -6.91 ) pc
Spectral type
F8V
Apparent magnitude V
11.6
Apparent magnitude I
—
Apparent magnitude J
—
Apparent magnitude H
—
Apparent magnitude K
—
Mass
1.256 ( +0.056 -0.062 ) MSun
Age
1.09 ( +1.5 -0.78 ) Gyr
Effective temperature
6180.0 ( +160.0 -140.0 ) K
Radius
1.236 ( +0.043 -0.036 ) RSun
Metallicity [Fe/H]
0.337 ( ± 0.076 )
Detected Disc
—
Magnetic Field
—
RA2000
16:55:04.5
Dec2000
-28:42:38.0
Alternate Names
EPIC 229426032, 2MASS J16550453-2842380, WISE J165504.52-284238.0, TOI-1049

Eeles-Nolle & Armstrong (2025): A faint companion star, likely a low-mass M dwarf or even a white dwarf (Gaia DR3 6032747008550759168, G = 19.56), lies 32.23 arcseconds away (10,150 AUs at 315 pc).

No link