Planet K2-261 b

Name K2-261 b
Planet Status Confirmed
Discovered in 2018
Mass 0.223 (± 0.031) MJ
Mass*sin(i)
Semi-Major Axis 0.102 ( -0.02 +0.019 ) AU
Orbital Period 11.63344 (± 0.00012) day
Eccentricity 0.39 (± 0.15)
ω 143.0 (± 18.0) deg
Tperi 2457907.58 ( -0.4 +0.59 ) JD
Radius 0.85 ( -0.022 +0.026 ) RJ
Inclination 88.4 ( -1.9 +1.1 ) deg
Update 2019-07-01
Detection Method Primary Transit
Mass Detection Method Radial Velocity
Radius Detection Method Primary Transit
Primary transit 2457906.84084 ( -0.00067 +0.00054 ) JD
Secondary transit
λ
Impact Parameter b 0.27 (± 0.18)
Time Vr=0
Velocity Semiamplitude K 18.8 (± 2.6) m/s
Calculated temperature 1080.0 ( -110.0 +100.0 ) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names EPIC 201498078 b

Star

K2-261
Name K2-261
Distance 214.6 (± 2.0) pc
Spectral type G71V
Apparent magnitude V 10.6
Mass 1.1 ( -0.02 +0.01 ) MSun
Age 8.8 ( -0.3 +0.4 ) 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
Alternate Names 2MASS J10520778+0029359, EPIC 201498078
Planetary system 1 planet

More data

Observability Predictor

Remarks

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.

Related publications

K2-161b: A low density Super Neptune on an eccentric orbit
2019 BRAHM R., ESPINOZA N., RABUS M., JORDAN A., DIAZ M. et al.
MNRAS, 483, 1970
paper  arxiv  

K2-260 b: a hot Jupiter transiting an F star, and K2-261 b: a warm Saturn around a bright G star
2018 JOHNSON M., DAI F., JUSTESEN A., GANDOLFI D., HATZES A. et al.
MNRAS, 481, 596
paper  arxiv