TEPCat: Kepler-18c


 

This page summarises the information held within TEPCat for the transiting planetary system Kepler-18c. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2011ApJS..197....7C  
Date of discovery paper 2011 / 10 / 5 y / m / d
Right ascension 19 52 19.06 h m s
Declination +44 44 46.7 d m s
V-band apparent magnitude 13.75 mag
K-band apparent magnitude 11.76 mag
Transit duration 0.1453
( 3.487 )
day
hour
Transit depth 0.2 %
Time of mid-transit   2455167.0833 ± 0.0023     HJD or BJD
Orbital period 7.64159 ± 0.00003 days
Reference for orbital ephemeris   2011ApJS..197....7C  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5383 ± 44 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.20 ± 0.04 dex
Stellar mass 0.972 ± 0.042   Msun
Stellar radius 1.108 ± 0.051 Rsun
Stellar logarithmic surface gravity 4.31 ± 0.12 c.g.s.
Stellar mean density 0.72 ± 0.09
( 1.02 ± 0.13 )
ρsun
g cm-3
Orbital eccentricity 0.00029 ± 0.00008  
Orbital semimajor axis   0.0752 ± 0.0011  AU
Planetary mass 0.054 ± 0.006
( 17.2 ± 1.9 )
Mjup
Mearth
Planetary radius 0.490 ± 0.023
( 5.49 ± 0.26 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 0.45 ± 0.05
( 0.597 ± 0.066 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2011ApJS..197....7C  

 

Kepler-18c does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

Kepler-18c has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/15           John Southworth   (Keele University, UK)