TEPCat: K2-55


 

This page summarises the information held within TEPCat for the transiting planetary system K2-55. 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 15 00.46 h m s
Declination −17 15 02.5 d m s
V-band apparent magnitude 13.55 mag
K-band apparent magnitude 10.47 mag
Transit duration 0.10
( 2.4 )
day
hour
Transit depth 0.40 %
Time of mid-transit   2456983.4229 ± 0.0004     HJD or BJD
Orbital period 2.849275 ± 0.000027 days
Reference for orbital ephemeris   arXiv:1804.05148  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 4300 +107 −100 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.376 ± 0.095 dex
Stellar mass 0.688 ± 0.069   Msun
Stellar radius 0.715 +0.043 −0.040 Rsun
Stellar logarithmic surface gravity 4.566 ± 0.036 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.124 +0.054 −0.055  
Orbital semimajor axis   0.0347 ± 0.001  AU
Planetary mass 0.138 ± 0.017
( 43.9 ± 5.4 )
Mjup
Mearth
Planetary radius 0.395 ± 0.026
( 4.43 ± 0.29 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 2.1 ± 0.5
( 2.79 ± 0.66 )
ρjup
g cm-3
Planetary equilibrium temperature 900 K
Reference of detailed study arXiv:1804.05148  

 

K2-55 does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-55 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2018/07/20           John Southworth   (Keele University, UK)