TEPCat: WASP-2


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-2. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007MNRAS.375..951C  
Date of discovery paper 2006 / 9 / 22 y / m / d
Right ascension 20 30 54.13 h m s
Declination +06 25 46.4 d m s
V-band apparent magnitude 11.98 mag
K-band apparent magnitude 9.63 mag
Transit duration 0.07372
( 1.7693 )
day
hour
Transit depth 2.0 %
Time of mid-transit   2453991.515553 ± 0.000074     HJD or BJD
Orbital period 2.15222114 ± 0.000000019 days
Reference for orbital ephemeris   arXiv:1708.07909  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5170 ± 60 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.04 ± 0.05 dex
Stellar mass 0.843 ± 0.038   Msun
Stellar radius 0.821 ± 0.014 Rsun
Stellar logarithmic surface gravity 4.536 ± 0.015 c.g.s.
Stellar mean density 1.524 ± 0.067
( 2.150 ± 0.095 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.0308 ± 0.0004  AU
Planetary mass 0.892 ± 0.030
( 283.56 ± 9.54 )
Mjup
Mearth
Planetary radius 1.060 ± 0.025
( 11.88 ± 0.28 )
Rjup
Rearth
Planetary surface gravity 19.70 ± 0.78
3.29 ± 0.02
m/s2
log(cgs)
Planetary mean density 0.701 ± 0.041
( 0.930 ± 0.054 )
ρjup
g cm-3
Planetary equilibrium temperature 1286 ± 17 K
Reference of detailed study arXiv:2001.08225  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Triaud et al. (2010)   −153   + 15   - 11  
Albrecht et al. (2011) indeterminate

 

 

WASP-2 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)