TEPCat: Kepler-138d


 

This page summarises the information held within TEPCat for the transiting planetary system Kepler-138d. 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 / 3 / 20 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 0.0750
( 1.800 )
day
hour
Transit depth 0.07 %
Time of mid-transit   2454957.8160 ± 0.0009     HJD or BJD
Orbital period 23.0923 ± 0.0006 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 0.010 ± 0.005  
Orbital semimajor axis   0.1288 ± 0.0010  AU
Planetary mass 0.0066 +0.0019 −0.0022
( 2.10 +0.60 −0.70 )
Mjup
Mearth
Planetary radius 0.135 ± 0.004
( 1.513 ± 0.045 )
Rjup
Rearth
Planetary surface gravity 9.8 +2.8 −2.9
3.0 +0.1 −0.2
m/s2
log(cgs)
Planetary mean density 2.7 ± 0.8
( 3.6 ± 1.1 )
ρjup
g cm-3
Planetary equilibrium temperature 345 ± 7 K
Reference of detailed study 2023NatAs...7..206P  

 

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

 


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