Planet K2-261 b

Detailed information about planet K2-261 b and its parameters.

Planet parameters Publications Observability Predictor

Planet

Name
K2-261 b
Planet Status
Confirmed
Discovered in
2018
Update
2024-09-06
Mass
0.223 ( ± 0.031 ) MJ
Mass*sin(i)
0.223 ( +0.031 -0.031 ) MJ
Semi-Major Axis
0.102 ( +0.019 -0.02 ) AU
Orbital Period
11.63344 ( ± 0.00012 ) day
Eccentricity
0.42 ( ± 0.03 )
ω
143.0 ( ± 18.0 ) deg
Tperi
2457907.58 ( +0.59 -0.4 ) JD
Radius
0.85 ( +0.026 -0.022 ) RJ
Inclination
88.4 ( +1.1 -1.9 ) deg
Detection Method
Primary Transit
Mass Meas. Method
Radial Velocity
Radius Meas. Method
Primary Transit
Primary transit
2457906.84084 ( +0.00054 -0.00067 ) JD
Secondary transit
—
λ
32.0 ( +48.0 -33.0 ) deg
Impact Parameter b
0.187
Time Vr=0
—
Velocity Semiamplitude K
18.8 ( ± 2.6 ) m/s
Calculated temperature
1080.0 ( +100.0 -110.0 ) K
Measured temperature
—
Hottest point longitude
—
Geometric albedo
—
Surface gravity log(g/gH)
—
Alternate Names
EPIC 201498078 b, 2MASS J10520778+0029359 b, TYC 255-257-1 b, WISE J105207.76+002935.6 b
Data Source Type Result Value Result Figure Notes Reference
Molecule Data Source Type Result Value Result Figure Notes Reference

The planet EPIC 201498078 b has been announced as K2-261 b by Johnson et al., MNRAS, august 2018 and as K2-161 b by Brahms et al. , MNRAS, november 2018.

Note that Mayo et al. 2018, gives also the name K2-161 b to EPIC 201231064 b.

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Star

Name
K2-261
Distance
214.58 ( +1.97 -1.97 ) pc
Spectral type
G7 IV/V
Apparent magnitude V
10.6
Mass
1.1 ( +0.01 -0.02 ) MSun
Age
8.8 ( +0.4 -0.3 ) Gyr
Effective temperature
5537.0 ( ± 71.0 ) K
Radius
1.65 ( ± 0.04 ) RSun
Metallicity [Fe/H]
0.36 ( ± 0.06 )
Detected Disc
—
Magnetic Field
—
RA2000
10:52:07.8
Dec2000
+00:29:36.1
Alternate Names
EPIC 201498078, 2MASS J10520778+0029359, TYC 255-257-1, WISE J105207.76+002935.6

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