TEPCat: Kepler-257d


 

This page summarises the information held within TEPCat for the transiting system Kepler-257d. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2014ApJ...784...45R  
Date of discovery paper 2014 / 3 / 20 y / m / d
Right ascension 19 49 15.83 h m s
Declination +46 01 23.7 d m s
V-band apparent magnitude 15.74 mag
K-band apparent magnitude 13.37 mag
Transit duration 0.1106
( 2.654 )
day
hour
Transit depth 0.24 %
Time of mid-transit   2455022.02052 ± 0.00102     HJD or BJD
Orbital period 24.664551 ± 0.000051 days
Reference for orbital ephemeris   2014ApJ...784...45R  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5180 ± 200 K
Stellar metal abundance ([Fe/H] or [M/H])   0.32 ± 0.50 dex
Stellar mass 0.898   Msun
Stellar radius 1.037 ± 0.518 Rsun
Stellar logarithmic surface gravity 4.360 ± 0.300 c.g.s.
Stellar mean density 1.136 ± 0.749
( 1.6 ± 1.1 )
ρsun
g cm-3
Orbital eccentricity  
Orbital semimajor axis     AU
Planetary mass Mjup
Mearth
Planetary radius 0.442 ± 0.221
( 5.0 ± 2.5 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature K
Reference of detailed study 2014ApJ...784...45R  

 

Kepler-257d does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

Kepler-257d has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/05           John Southworth   (Keele University, UK)