Planet K2-249 Ab

Detailed information about planet K2-249 Ab and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
K2-249 Ab
Planet Status
Confirmed
Discovered in
2018
Publication
Status
Published in a refereed paper
Update
2025-09-04
Mass
—
Mass*sin(i)
—
Semi-Major Axis
0.1151 ( +0.003 -0.0031 ) AU
Orbital Period
12.409 ( +0.00337 -0.00284 ) day
Eccentricity
—
Angular distance
—
ω
—
Tperi
—
Radius
0.249 ( +0.024 -0.02 ) RJ
Inclination
—
Detection Method
Primary Transit
Mass Meas. Method
—
Radius Meas. Method
—
Primary transit
—
Secondary transit
—
λ
—
Impact Parameter b
0.41 ( +0.33 -0.28 )
Time Vr=0
—
Velocity Semiamplitude K
—
Calculated temperature
1061.0 ( +66.0 -66.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
2MASS J12132801-0859425 b, EPIC 228748383 b, EPIC 228748383.01, TYC 5519-433-1 b, WISE J121328.01-085942.7 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

1 Sep 2025: See also Planets in Binaries webpage.

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Star

Name
K2-249 A
Distance
528.3 ( +16.9 -14.7 ) pc
Spectral type
F5IV-V
Apparent magnitude V
—
Apparent magnitude I
—
Apparent magnitude J
—
Apparent magnitude H
—
Apparent magnitude K
—
Mass
1.32 ( +0.09 -0.12 ) MSun
Age
—
Effective temperature
6504.0 ( +329.0 -419.0 ) K
Radius
1.57 ( +0.06 -0.06 ) RSun
Metallicity [Fe/H]
0.04 ( +0.14 -0.16 )
Detected Disc
—
Magnetic Field
—
RA2000
12:13:28.0
Dec2000
-08:59:42.4
Alternate Names
2MASS J12132801-0859425, EPIC 228748383, TYC 5519-433-1, WISE J121328.01-085942.7

Eeles-Nolle & Armstrong (2025): A faint companion star, likely an M dwarf (Gaia DR3 3582098107498438912, G = 18.75), lies 18.31 arcseconds away (9,670 AUs at 528 pc).

No link