TEPCat: K2-57


 

This page summarises the information held within TEPCat for the transiting system K2-57. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016ApJS..226....7C  
Date of discovery paper 2016 / 7 / 19 y / m / d
Right ascension 22 50 46.01 h m s
Declination −14 04 11.6 d m s
V-band apparent magnitude 14.50 mag
K-band apparent magnitude 11.64 mag
Transit duration 0.095
( 2.28 )
day
hour
Transit depth 0.09 %
Time of mid-transit   2456984.33600 ± 0.00480     HJD or BJD
Orbital period 9.006300 ± 0.001300 days
Reference for orbital ephemeris   2016ApJS..226....7C  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4434 ± 61 K
Stellar metal abundance ([Fe/H] or [M/H])   dex
Stellar mass 0.683 ± 0.056   Msun
Stellar radius 0.621 ± 0.049 Rsun
Stellar logarithmic surface gravity 4.680 ± 0.050 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity  
Orbital semimajor axis   0.075 ± 0.002  AU
Planetary mass Mjup
Mearth
Planetary radius 0.187 ± 0.022
( 2.10 ± 0.25 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2016ApJS..226....7C  

 

K2-57 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

K2-57 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)