TEPCat: Kepler-138c


 

This page summarises the information held within TEPCat for the transiting planetary system Kepler-138c. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2014ApJ...784...28K  
Date of discovery paper 2014 / 1 / 7 y / m / d
Right ascension 19 21 31.56 h m s
Declination +43 17 34.8 d m s
V-band apparent magnitude 13.34 mag
K-band apparent magnitude 9.51 mag
Transit duration 0.08
( 1.9 )
day
hour
Transit depth 0.07 %
Time of mid-transit   2454955.72666 ± 0.00049     HJD or BJD
Orbital period 13.7811977 ± 0.0000075 days
Reference for orbital ephemeris   2017AJ....153..267M  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3726 +44 −40 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.16 ± 0.09 dex
Stellar mass 0.468 +0.020 −0.028   Msun
Stellar radius 0.454 +0.025 −0.023 Rsun
Stellar logarithmic surface gravity 4.886 ± 0.055 c.g.s.
Stellar mean density 5.00 +0.52 −0.50
( 7.05 +0.73 −0.71 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.19 −-1  
Orbital semimajor axis     AU
Planetary mass 0.0062 +0.0060 −0.0035
( 2.0 +1.9 −1.1 )
Mjup
Mearth
Planetary radius 0.104 ± 0.006
( 1.166 ± 0.067 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 4.7 +4.3 −2.6
( 6.2 +5.7 −3.4 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2017AJ....153..267M  

 

Kepler-138c does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

Kepler-138c has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/12           John Southworth   (Keele University, UK)