TEPCat: WASP-138


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-138. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2017A+A...599A...3L  
Date of discovery paper 2016 / 7 / 27 y / m / d
Right ascension 02 46 33.37 h m s
Declination −00 27 50.0 d m s
V-band apparent magnitude 11.81 mag
K-band apparent magnitude 10.49 mag
Transit duration 0.1572
( 3.773 )
day
hour
Transit depth 0.7 %
Time of mid-transit   2457326.62183 ± 0.00032     HJD or BJD
Orbital period 3.634433 ± 0.000005 days
Reference for orbital ephemeris   2017A+A...599A...3L  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6300 ± 100 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.09 ± 0.10 dex
Stellar mass 1.22 ± 0.05   Msun
Stellar radius 1.36 ± 0.05 Rsun
Stellar logarithmic surface gravity 4.25 ± 0.02 c.g.s.
Stellar mean density 0.488 ± 0.044
( 0.689 ± 0.062 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0494 ± 0.0007  AU
Planetary mass 1.22 ± 0.08
( 387 ± 25 )
Mjup
Mearth
Planetary radius 1.09 ± 0.05
( 12.22 ± 0.56 )
Rjup
Rearth
Planetary surface gravity 22.9 +2.2 −2.0
3.36 +0.04 −0.04
m/s2
log(cgs)
Planetary mean density 0.92 +0.097 −0.146
( 1.22 +0.13 −0.19 )
ρjup
g cm-3
Planetary equilibrium temperature 1590 ± 31 K
Reference of detailed study 2017A+A...599A...3L  

 

WASP-138 does not have an entry in the catalogue of Rossiter-McLaughlin measurements.

 

WASP-138 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/15           John Southworth   (Keele University, UK)