TEPCat: K2-21c


 

This page summarises the information held within TEPCat for the transiting planetary system K2-21c. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2015ApJ...811..102P  
Date of discovery paper 2015 / 7 / 30 y / m / d
Right ascension 22 41 12.89 h m s
Declination −14 29 20.4 d m s
V-band apparent magnitude 12.85 mag
K-band apparent magnitude 9.42 mag
Transit duration 0.096
( 2.30 )
day
hour
Transit depth 0.10 %
Time of mid-transit   2456988.4708 ± 0.0019     HJD or BJD
Orbital period 15.50120 ± 0.00096 days
Reference for orbital ephemeris   2015ApJ...811..102P  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4043 ± 375 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.11 ± 0.13 dex
Stellar mass 0.64 ± 0.11   Msun
Stellar radius 0.60 ± 0.10 Rsun
Stellar logarithmic surface gravity c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity  
Orbital semimajor axis   0.1026 +0.0079 −0.0094  AU
Planetary mass Mjup
Mearth
Planetary radius 0.171 +0.048 −0.046
( 1.92 +0.54 −0.52 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature 420 K
Reference of detailed study 2015ApJ...811..102P  

 

K2-21c does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

K2-21c has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


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