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 3933 ± 37 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.127 ± 0.086 dex
Stellar mass 0.551 ± 0.068   Msun
Stellar radius 0.582 ± 0.045 Rsun
Stellar logarithmic surface gravity 4.647 ± 0.059 c.g.s.
Stellar mean density 2.78 +0.57 −0.47
( 3.92 +0.80 −0.66 )
ρsun
g cm-3
Orbital eccentricity 0.0060 +0.0082 −0.0044  
Orbital semimajor axis   0.0760 ± 0.0033  AU
Planetary mass 0.0006 ± 0.0002
( 0.191 ± 0.064 )
Mjup
Mearth
Planetary radius 0.0625 ± 0.0059
( 0.701 ± 0.066 )
Rjup
Rearth
Planetary surface gravity 3.8 +1.1 −1.0
2.6 +0.1 −0.1
m/s2
log(cgs)
Planetary mean density 2.28 +0.75 −0.66
( 3.02 +0.99 −0.88 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study arXiv:1805.12520  

 

Kepler-138b does not have an entry in the catalogue of orbital obliquity measurements.

 

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

 


Page generated on 2018/11/16           John Southworth   (Keele University, UK)