TEPCat: K2-38b


 

This page summarises the information held within TEPCat for the transiting planetary system K2-38b. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2016ApJ...827...78S  
Date of discovery paper 2015 / 12 / 1 y / m / d
Right ascension 16 00 08.06 h m s
Declination −23 11 21.4 d m s
V-band apparent magnitude 11.39 mag
K-band apparent magnitude 9.47 mag
Transit duration 0.12
( 2.9 )
day
hour
Transit depth 0.2 %
Time of mid-transit   2456896.8786 ± 0.0054     HJD or BJD
Orbital period 4.01593 ± 0.00050 days
Reference for orbital ephemeris   2016ApJ...827...78S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5757 ± 60 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.28 ± 0.04 dex
Stellar mass 1.03 +0.04 −0.02   Msun
Stellar radius 1.06 +0.09 −0.06 Rsun
Stellar logarithmic surface gravity 4.38 ± 0.11 c.g.s.
Stellar mean density ρsun
g cm-3
Orbital eccentricity 0.197 +0.061 −0.060  
Orbital semimajor axis   0.04994 +0.00048 −0.00049  AU
Planetary mass 0.0230 +0.0035 −0.0031
( 7.31 +1.11 −0.99 )
Mjup
Mearth
Planetary radius 0.137 ± 0.012
( 1.54 ± 0.13 )
Rjup
Rearth
Planetary surface gravity m/s2
log(cgs)
Planetary mean density 8.3 +3.1 −2.1
( 11.0 + 4.1 − 2.8 )
ρjup
g cm-3
Planetary equilibrium temperature 1266 +44 −50 K
Reference of detailed study arXiv:2007.01081  

 

K2-38b does not have an entry in the catalogue of orbital obliquity measurements.

 

K2-38b has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/01/04           John Southworth   (Keele University, UK)