TEPCat: K2-28


 

This page summarises the information held within TEPCat for the transiting planetary system K2-28. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016ApJ...820...41H  
Date of discovery paper 2015 / 11 / 30 y / m / d
Right ascension 22 22 29.85 h m s
Declination −07 57 19.3 d m s
V-band apparent magnitude 16.06 mag
K-band apparent magnitude 10.75 mag
Transit duration 0.04
( 1.0 )
day
hour
Transit depth 0.06 %
Time of mid-transit   2457931.89780 ± 0.00037     HJD or BJD
Orbital period 2.2604455 ± 0.0000010 days
Reference for orbital ephemeris   arXiv:1807.04420  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3214 ± 60 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.26 ± 0.05 dex
Stellar mass 0.257 ± 0.048   Msun
Stellar radius 0.288 ± 0.028 Rsun
Stellar logarithmic surface gravity 4.93 ± 0.04 c.g.s.
Stellar mean density 10.4 ± 2.8
( 14.7 ± 4.0 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0191 +0.0037 −0.0029  AU
Planetary mass Mjup
Mearth
Planetary radius 0.229 ± 0.024
( 2.57 ± 0.27 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density ρjup
g cm-3
Planetary equilibrium temperature 421 +29 −32 K
Reference of detailed study arXiv:1807.04420  

 

K2-28 does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-28 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2018/07/18           John Southworth   (Keele University, UK)