TEPCat: Kepler-421


 

This page summarises the information held within TEPCat for the transiting planetary system Kepler-421. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2014ApJ...795...25K  
Date of discovery paper 2014 / 7 / 21 y / m / d
Right ascension 18 53 01.63 h m s
Declination +45 05 16.0 d m s
V-band apparent magnitude 13.56 mag
K-band apparent magnitude 11.54 mag
Transit duration 0.658
( 15.79 )
day
hour
Transit depth 0.3 %
Time of mid-transit   2455325.7674 ± 0.0012     HJD or BJD
Orbital period 704.1984 ± 0.0016 days
Reference for orbital ephemeris   2014ApJ...795...25K  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5308 ± 50 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.25 ± 0.08 dex
Stellar mass 0.794 ± 0.030   Msun
Stellar radius 0.757 ± 0.029 Rsun
Stellar logarithmic surface gravity 4.61 ± 0.10 c.g.s.
Stellar mean density 1.12 +0.16 −0.26
( 1.58 +0.23 −0.37 )
ρsun
g cm-3
Orbital eccentricity 0.041 +0.095 −0.034  
Orbital semimajor axis   1.219 +0.089 −0.106  AU
Planetary mass Mjup
Mearth
Planetary radius 0.371 +0.017 −0.014
( 4.16 +0.19 −0.16 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature 185 +9 −5 K
Reference of detailed study 2014ApJ...795...25K  

 

Kepler-421 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

Kepler-421 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)