TEPCat: WASP-31


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-31. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2011A+A...531A..60A  
Date of discovery paper 2010 / 11 / 25 y / m / d
Right ascension 11 17 45.35 h m s
Declination −19 03 17.3 d m s
V-band apparent magnitude 11.94 mag
K-band apparent magnitude 10.65 mag
Transit duration 0.1103
( 2.647 )
day
hour
Transit depth 1.6 %
Time of mid-transit   2455873.86662 ± 0.00011     HJD or BJD
Orbital period 3.40588600 ± 0.00000078 days
Reference for orbital ephemeris   2015MNRAS.446.2428S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6175 ± 70 K
Stellar metal abundance ([Fe/H] or [M/H])   −0.20 ± 0.09 dex
Stellar mass 1.163 ± 0.026   Msun
Stellar radius 1.252 ± 0.033 Rsun
Stellar logarithmic surface gravity 4.308 ± 0.020 c.g.s.
Stellar mean density 0.592 ± 0.042
( 0.835 ± 0.059 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.04659 ± 0.00035  AU
Planetary mass 0.478 ± 0.029
( 151.95 ± 9.22 )
Mjup
Mearth
Planetary radius 1.549 ± 0.050
( 17.36 ± 0.56 )
Rjup
Rearth
Planetary surface gravity 4.56 ± 0.38
2.66 ± 0.03
m/s2
log(cgs)
Planetary mean density 0.129 ± 0.014
( 0.171 ± 0.019 )
ρjup
g cm-3
Planetary equilibrium temperature 1575 ± 32 K
Reference of detailed study 2011A+A...531A..60A  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Brown et al. (2012)   2.8   ±   3.1  
Albrecht et al. (2012)   −6   ±   6  

 

 

WASP-31 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)