TEPCat: WASP-20


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-20. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2015A+A...575A..61A  
Date of discovery paper 2014 / 2 / 7 y / m / d
Right ascension 00 20 38.53 h m s
Declination −23 56 08.6 d m s
V-band apparent magnitude 10.68 mag
K-band apparent magnitude 9.39 mag
Transit duration 0.1418
( 3.403 )
day
hour
Transit depth 1.2 %
Time of mid-transit   2455715.65562 ± 0.00029     HJD or BJD
Orbital period 4.8996284 ± 0.0000033 days
Reference for orbital ephemeris   2015A+A...575A..61A  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5987 ± 20 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.07 ± 0.02 dex
Stellar mass 1.113 ± 0.034   Msun
Stellar radius 1.242 ± 0.045 Rsun
Stellar logarithmic surface gravity 4.296 ± 0.030 c.g.s.
Stellar mean density 0.581 ± 0.060
( 0.820 ± 0.085 )
ρsun
g cm-3
Orbital eccentricity 0.0 +0.11 −0.0  
Orbital semimajor axis   0.05851 ± 0.00059  AU
Planetary mass 0.396 ± 0.046
( 125 ± 14 )
Mjup
Mearth
Planetary radius 1.382 ± 0.057
( 15.49 ± 0.64 )
Rjup
Rearth
Planetary surface gravity 5.13 ± 0.73
2.71 ± 0.06
m/s2
log(cgs)
Planetary mean density 0.140 ± 0.024
( 0.186 ± 0.032 )
ρjup
g cm-3
Planetary equilibrium temperature 1330 ± 25 K
Reference of detailed study arXiv:2001.08225  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Anderson et al. (2015)   12.7   ±   4.2  

 

 

WASP-20 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2021/12/02           John Southworth   (Keele University, UK)