TEPCat: WASP-8


 

This page summarises the information held within TEPCat for the transiting planetary system WASP-8. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2010A+A...517L...1Q  
Date of discovery paper 2010 / 6 / 26 y / m / d
Right ascension 23 59 36.07 h m s
Declination −35 01 52.9 d m s
V-band apparent magnitude 9.77 mag
K-band apparent magnitude 8.09 mag
Transit duration 0.1832
( 4.397 )
day
hour
Transit depth 1.3 %
Time of mid-transit   2454679.33741 ± 0.00047     HJD or BJD
Orbital period 8.15875416 ± 0.00000016 days
Reference for orbital ephemeris   2010A+A...517L...1Q  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 5690 ± 36 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.29 ± 0.03 dex
Stellar mass 1.093 ± 0.033   Msun
Stellar radius 0.976 ± 0.021 Rsun
Stellar logarithmic surface gravity 4.498 ± 0.018 c.g.s.
Stellar mean density 1.176 ± 0.070
( 1.659 ± 0.099 )
ρsun
g cm-3
Orbital eccentricity 0.3100 +0.0029 −0.0024  
Orbital semimajor axis   0.0817 ± 0.0008  AU
Planetary mass 2.216 ± 0.047
( 704 ± 14 )
Mjup
Mearth
Planetary radius 1.165 ± 0.033
( 13.06 ± 0.37 )
Rjup
Rearth
Planetary surface gravity 42.5 ± 2.3
3.63 ± 0.02
m/s2
log(cgs)
Planetary mean density 1.31 ± 0.10
( 1.74 ± 0.13 )
ρjup
g cm-3
Planetary equilibrium temperature 947 ± 12 K
Reference of detailed study arXiv:2001.08225  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Queloz et al. (2010)   −123.3   + 3.4   - 4.4  
Bourrier et al. (2017)   −143.0   + 1.6   - 1.5  

 

 

WASP-8 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)