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
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 0.0750
( 1.800 )
day
hour
Transit depth 0.06 %
Time of mid-transit   2454957.83521 ± 0.00085     HJD or BJD
Orbital period 23.088920 ± 0.000024 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 0.0270 ± 0.0050  
Orbital semimajor axis   0.1301 ± 0.0056  AU
Planetary mass 0.0037 ± 0.0009
( 1.18 ± 0.29 )
Mjup
Mearth
Planetary radius 0.150 ± 0.013
( 1.68 ± 0.15 )
Rjup
Rearth
Planetary surface gravity 4.1 ± 1.0
2.61 ± 0.09
m/s2
log(cgs)
Planetary mean density 1.03 +0.33 −0.26
( 1.37 +0.44 −0.34 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study arXiv:1805.12520  

 

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

 

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

 


Page generated on 2018/07/13           John Southworth   (Keele University, UK)