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
Right ascension 19 16 15.97 h m s
Declination −17 54 38.5 d m s
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   2457325.81714 ± 0.00033     HJD or BJD
Orbital period 28.38236 ± 0.00026 days
Reference for orbital ephemeris   2018MNRAS.475.1765B  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5340 ± 110 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.22 ± 0.08 dex
Stellar mass 0.919 ± 0.033   Msun
Stellar radius 0.862 ± 0.032 Rsun
Stellar logarithmic surface gravity 4.50 ± 0.09 c.g.s.
Stellar mean density 1.43 +0.18 −0.16
( 2.02 +0.25 −0.23 )
ρsun
g cm-3
Orbital eccentricity 0.12 +0.12 −0.08  
Orbital semimajor axis   0.179 +0.029 −0.027  AU
Planetary mass 0.387 +0.083 −0.075
( 123 +26 −23 )
Mjup
Mearth
Planetary radius 0.808 +0.034 −0.033
( 9.06 +0.38 −0.37 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 0.69 +0.18 −0.15
( 0.92 +0.24 −0.20 )
ρjup
g cm-3
Planetary equilibrium temperature 565 +48 −32 K
Reference of detailed study 2018MNRAS.475.1765B  

 

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 2019/07/16           John Southworth   (Keele University, UK)