TEPCat: K2-222


 

This page summarises the information held within TEPCat for the transiting planetary system K2-222. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2018AJ....155..136M  
Date of discovery paper 2018 / 2 / 14 y / m / d
Data/telescope used for discovery K2  
Right ascension 01 05 50.95 h m s
Declination +11 45 12.3 d m s
Right ascension (decimal) 16.46229 degrees
Declination (decimal) 11.75342 degrees
V-band apparent magnitude 9.54 mag
K-band apparent magnitude 8.11 mag
Transit duration 0.1836
( 4.406 )
day
hour
Transit depth 0.04 %
Time of mid-transit   2457399.0595 ± 0.0016     HJD or BJD
Orbital period 15.38857 ± 0.00088 days
Reference for orbital ephemeris   arXiv:2111.02608  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5942 ± 119 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.315 ± 0.06 dex
Stellar mass 0.94 ± 0.05   Msun
Stellar radius 1.072 ± 0.043 Rsun
Stellar logarithmic surface gravity 4.35 ± 0.02 c.g.s.
Stellar mean density 0.76 +0.05 −0.04
( 1.072 +0.071 −0.056 )
ρsun
g cm-3
Orbital eccentricity 0.16 +0.09 −0.10  
Orbital semimajor axis     AU
Planetary mass 0.025 ± 0.006
( 7.9 ± 1.9 )
Mjup
Mearth
Planetary radius 0.210 +0.007 −0.006
( 2.354 +0.078 −0.067 )
Rjup
Rearth
Planetary surface gravity 14.2 ± 3.3
3.15 ± 0.09
m/s2
log(cgs)
Planetary mean density 2.6 ± 0.6
( 3.45 ± 0.80 )
ρjup
g cm-3
Planetary equilibrium temperature 878 +17 −16 K
Reference of detailed study arXiv:2111.02608  

 

K2-222 does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-222 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2022/12/07           John Southworth   (Keele University, UK)