TEPCat: HAT-P-4


 

This page summarises the information held within TEPCat for the transiting planetary system HAT-P-4. Please see here for descriptions of the quantities given below.

 

Discovery and basic observable quantities:
 
Quantity Value Unit
Reference of discovery paper 2007ApJ...670L..41K  
Date of discovery paper 2007 / 8 / 14 y / m / d
Data/telescope used for discovery HAT  
Right ascension 15 19 57.93 h m s
Declination +36 13 46.9 d m s
Right ascension (decimal) 229.99137 degrees
Declination (decimal) 36.22969 degrees
V-band apparent magnitude 11.00 mag
K-band apparent magnitude 9.77 mag
Transit duration 0.1775
( 4.260 )
day
hour
Transit depth 0.9 %
Time of mid-transit   2454245.81521 ± 0.00020     HJD or BJD
Orbital period 3.0565254 ± 0.0000012 days
Reference for orbital ephemeris   2012PASP..124..212S  

 

Physical properties from the most recent detailed study:
 
Quantity Value Unit
Stellar effective temperature 6036 ± 46 K
Stellar metal abundance ([Fe/H] or [M/H])   +0.277 ± 0.007 dex
Stellar mass 1.271 +0.120 −0.070   Msun
Stellar radius 1.600 +0.116 −0.041 Rsun
Stellar logarithmic surface gravity 4.134 +0.017 −0.038 c.g.s.
Stellar mean density 0.310 +0.016 −0.041
( 0.437 +0.023 −0.058 )
ρsun
g cm-3
Orbital eccentricity 0.0  
Orbital semimajor axis   0.04465 +0.00140 −0.00082  AU
Planetary mass 0.680 +0.046 −0.029
( 216.17 +14.62 −9.22 )
Mjup
Mearth
Planetary radius 1.337 +0.079 −0.035
( 14.99 + 0.89 − 0.39 )
Rjup
Rearth
Planetary surface gravity 9.42 +0.44 −0.91
2.97 +0.02 −0.04
m/s2
log(cgs)
Planetary mean density 0.266 +0.018 −0.038
( 0.353 +0.024 −0.050 )
ρjup
g cm-3
Planetary equilibrium temperature 1691 +46 −26 K
Reference of detailed study 2011MNRAS.417.2166S  

 

Entries in the catalogue of orbital obliquity measurements:
 
Reference λ (degrees)
Winn et al. (2011)   −4.9   ±   11.9  

 

 


Page generated on 2024/03/28           John Southworth   (Keele University, UK)