TEPCat: HAT-P-8


 

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

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2009ApJ...704.1107L  
Date of discovery paper 2008 / 12 / 8 y / m / d
Right ascension 22 52 09.86 h m s
Declination +35 26 49.6 d m s
V-band apparent magnitude 10.30 mag
K-band apparent magnitude 8.95 mag
Transit duration 0.1587
( 3.809 )
day
hour
Transit depth 0.7 %
Time of mid-transit   2454437.6742 ± 0.0014     HJD or BJD
Orbital period 3.0763458 ± 0.0000024 days
Reference for orbital ephemeris   2013A+A...551A..11M  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6200 ± 80 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.01 ± 0.08 dex
Stellar mass 1.192 ± 0.075   Msun
Stellar radius 1.475 ± 0.034 Rsun
Stellar logarithmic surface gravity 4.177 ± 0.022 c.g.s.
Stellar mean density 0.517 ± 0.035
( 0.729 ± 0.049 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.04390 ± 0.00091  AU
Planetary mass 1.275 ± 0.053
( 405 ± 16 )
Mjup
Mearth
Planetary radius 1.321 ± 0.040
( 14.81 ± 0.45 )
Rjup
Rearth
Planetary surface gravity 18.11 ± 0.82
3.26 ± 0.02
m/s2
log(cgs)
Planetary mean density 0.371 ± 0.022
( 0.492 ± 0.029 )
ρjup
g cm-3
Planetary equilibrium temperature 1713 ± 27 K
Reference of detailed study 2013A+A...551A..11M  

 

Entries in the catalogue of Rossiter-McLaughlin measurements:
 
Reference λ (degrees)
Simpson et al. (2011)   −9.7   + 9.0   - 7.7  
Moutou et al. (2011)   −17   + 9.2   - 11.5  

 

 

HAT-P-8 has not been analysed as part of the Homogeneous Studies of Transiting Extrasolar Planets project.

 


Page generated on 2017/12/11           John Southworth   (Keele University, UK)