From the Extrasolar Planets Encyclopaedia : http://exoplanet.eu 
Planet : HAT-P-3 b
THE PLANET
Basic data : 
 
Name HAT-P-3 b
Discovered in2007   
M.sin i0.599 (± 0.028) MJ ref.
Semi major axis0.03894 (± 0.0007) AU ref.
Orbital period2.899703 (± 5.4e-05) days ref.
Eccentricity  ref.
Radius0.89 (± 0.046) RJ ref.
Ttransit54218.7594 HJD 2.400.000 ref.
Inclination87.24 (± 0.69) deg. ref.
Update27/11/08   
No molecule detected
 
Remarks : 
 Light Curve by Bruce Gary
Other web pages : 
 CAS Exoplanet Transit database
 25 related publications :  (sort by author)  (sort by date)
THE STAR
Basic data :   
More data : 
  - Basic data (from Simbad)
- Most recent ref (from ADS)
 
Name HAT-P-3
Distance140 (± 13) pc ref.
Spectral Type  
Apparent Magnitude V11.86   
Apparent Magnitude H9.542   
Apparent Magnitude J9.936   
Apparent Magnitude K9.448   
Mass0.936 (−0.062+0.036Msun ref.
Age0.4 (−0.3+6.5Gyr ref.
Effective Temperature5185 (± 46) K ref.
Radius0.824 (−0.035+0.043Rsun ref.
Metallicity [Fe/H]0.27 (± 0.04)   ref.
Right Asc. Coord.13 44 23   
Decl. Coord.+48 01 43