TEPCat: Kepler-18b


 

This page summarises the information held within TEPCat for the transiting planetary system Kepler-18b. 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 0.0865
( 2.076 )
day
hour
Transit depth 0.03 %
Time of mid-transit   2454966.5068 ± 0.0021     HJD or BJD
Orbital period 3.504725 ± 0.000004 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 0.0  
Orbital semimajor axis   0.0447 ± 0.0006  AU
Planetary mass 0.022 ± 0.011
( 7.0 ± 3.5 )
Mjup
Mearth
Planetary radius 0.178 ± 0.009
( 2.00 ± 0.10 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 3.7 ± 1.8
( 4.9 ± 2.4 )
ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2011ApJS..197....7C  

 

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

 

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

 


Page generated on 2017/12/11           John Southworth   (Keele University, UK)