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
Data/telescope used for discovery Kepler  
Right ascension 19 21 31.56 h m s
Declination +43 17 34.8 d m s
Right ascension (decimal) 290.38150 degrees
Declination (decimal) 43.29300 degrees
V-band apparent magnitude 13.34 mag
K-band apparent magnitude 9.51 mag
Transit duration 0.10
( 2.4 )
day
hour
Transit depth 0.03 %
Time of mid-transit   2454956.236 ± 0.003     HJD or BJD
Orbital period 10.3134 ± 0.0003 days
Reference for orbital ephemeris   2023NatAs...7..206P  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3841 +50 −51 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.18 ± 0.10 dex
Stellar mass 0.535 ± 0.012   Msun
Stellar radius 0.535 +0.013 −0.014 Rsun
Stellar logarithmic surface gravity 4.71 ± 0.03 c.g.s.
Stellar mean density 3.5 ± 0.3
( 4.94 ± 0.42 )
ρsun
g cm-3
Orbital eccentricity 0.020 ± 0.009  
Orbital semimajor axis   0.0753 ± 0.0006  AU
Planetary mass 0.0002 ± 0.0001
( 0.064 ± 0.032 )
Mjup
Mearth
Planetary radius 0.0571 ± 0.0018
( 0.640 ± 0.020 )
Rjup
Rearth
Planetary surface gravity 1.91 +0.55 −0.53
2.3 +0.1 −0.1
m/s2
log(cgs)
Planetary mean density 1.3 ± 0.4
( 1.72 ± 0.53 )
ρjup
g cm-3
Planetary equilibrium temperature 452 +8 −9 K
Reference of detailed study 2023NatAs...7..206P  

 

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

 


Page generated on 2024/04/19           John Southworth   (Keele University, UK)