TEPCat: Kepler-138b


 

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

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2014ApJ...784...45R  
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 0.10
( 2.4 )
day
hour
Transit depth 0.07 %
Time of mid-transit   2454956.2047 ± 0.0037     HJD or BJD
Orbital period 10.313207 ± 0.000040 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 +0.22 −-1  
Orbital semimajor axis     AU
Planetary mass 0.0002 +0.0002 −0.0001
( 0.064 +0.064 −0.032 )
Mjup
Mearth
Planetary radius 0.041 ± 0.003
( 0.460 ± 0.034 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 2.0 +1.8 −1.1
( 2.7 +2.4 −1.5 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2017AJ....153..267M  

 

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

 

Kepler-138b 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)