TEPCat: K2-139


 

This page summarises the information held within TEPCat for the transiting planetary system K2-139. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2018MNRAS.475.1765B  
Date of discovery paper 2017 / 2 / 3 y / m / d
Data/telescope used for discovery K2  
Right ascension 19 16 15.97 h m s
Declination −17 54 38.5 d m s
Right ascension (decimal) 289.06654 degrees
Declination (decimal) -17.91069 degrees
V-band apparent magnitude 11.65 mag
K-band apparent magnitude 9.66 mag
Transit duration 0.204
( 4.90 )
day
hour
Transit depth 1.1 %
Time of mid-transit   2459057.16689 ± 0.00083     HJD or BJD
Orbital period 28.382796 ± 0.000042 days
Reference for orbital ephemeris   arXiv:2205.09355  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5245 +73 −33 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.22 ± 0.08 dex
Stellar mass 0.883 +0.021 −0.029   Msun
Stellar radius 0.863 +0.019 −0.014 Rsun
Stellar logarithmic surface gravity 4.53 ± 0.05 c.g.s.
Stellar mean density 1.37 ± 0.09
( 1.93 ± 0.13 )
ρsun
g cm-3
Orbital eccentricity 0.12 +0.12 −0.08  
Orbital semimajor axis   0.179 +0.029 −0.027  AU
Planetary mass 0.382 ± 0.078
( 121 ± 24 )
Mjup
Mearth
Planetary radius 0.803 +0.024 −0.023
( 9.00 +0.27 −0.26 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 0.69 +0.16 −0.15
( 0.92 +0.21 −0.20 )
ρjup
g cm-3
Planetary equilibrium temperature 536 +11 −8 K
Reference of detailed study arXiv:2205.09355  

 

K2-139 does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-139 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2022/12/01           John Southworth   (Keele University, UK)