TEPCat: K2-56


 

This page summarises the information held within TEPCat for the transiting planetary system K2-56. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper arXiv:1601.07608  
Date of discovery paper 2016 / 1 / 29 y / m / d
Right ascension 03 34 36.23 h m s
Declination +20 35 57.2 d m s
V-band apparent magnitude 11.04 mag
K-band apparent magnitude 9.37 mag
Transit duration 0.236
( 5.66 )
day
hour
Transit depth 0.06 %
Time of mid-transit   2457151.9021 ± 0.0045     HJD or BJD
Orbital period 41.6855 ± 0.0031 days
Reference for orbital ephemeris   arXiv:1601.07608  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5766 ± 99 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.15 ± 0.05 dex
Stellar mass 0.961 +0.032 −0.029   Msun
Stellar radius 0.928 +0.055 −0.044 Rsun
Stellar logarithmic surface gravity 4.5 ± 0.08 c.g.s.
Stellar mean density 1.20 +0.14 −0.18
( 1.69 +0.20 −0.25 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.36 −0.0  
Orbital semimajor axis   0.241 +0.019 −0.017  AU
Planetary mass 0.051 ± 0.019
( 16.2 ± 6.0 )
Mjup
Mearth
Planetary radius 0.199 +0.013 −0.010
( 2.23 +0.15 −0.11 )
Rjup
Rearth
Planetary surface gravity 32 ± 12
3.5 ± 0.1
m/s2
log(cgs)
Planetary mean density 5.9 +2.6 −2.3
( 7.8 +3.4 −3.1 )
ρjup
g cm-3
Planetary equilibrium temperature 546 +19 −18 K
Reference of detailed study arXiv:1601.07608  

 

K2-56 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

K2-56 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)