TEPCat: K2-25b


 

This page summarises the information held within TEPCat for the transiting planetary system K2-25b. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016ApJ...818...46M  
Date of discovery paper 2015 / 12 / 3 y / m / d
Right ascension 04 13 05.62 h m s
Declination +15 14 52.0 d m s
V-band apparent magnitude 15.88 mag
K-band apparent magnitude 10.44 mag
Transit duration 0.03128
( 0.7507 )
day
hour
Transit depth 1.2 %
Time of mid-transit   2458515.64206 ± 0.00010     HJD or BJD
Orbital period 3.48456408 ± 0.00000006 days
Reference for orbital ephemeris   arXiv:2007.12766  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 3207 ± 58 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.15 ± 0.03 dex
Stellar mass 0.2634 ± 0.0077   Msun
Stellar radius 0.2932 ± 0.0093 Rsun
Stellar logarithmic surface gravity 4.944 ± 0.031 c.g.s.
Stellar mean density 10.4 ± 1.1
( 14.7 ± 1.6 )
ρsun
g cm-3
Orbital eccentricity 0.428 +0.050 −0.049  
Orbital semimajor axis   0.0287 ± 0.0012  AU
Planetary mass 0.077 +0.018 −0.016
( 24.5 +5.7 −5.1 )
Mjup
Mearth
Planetary radius 0.306 ± 0.011
( 3.43 ± 0.12 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 11.0 ± 0.9
( 14.6 ± 1.2 )
ρjup
g cm-3
Planetary equilibrium temperature 494 ± 11 K
Reference of detailed study arXiv:2007.12766  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Gaidos et al. (2020)   1.7   + 5.8   - 3.7  
Stefansson et al. (2020)   3   ±   16  

 

 

K2-25b has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/11/15           John Southworth   (Keele University, UK)