Orbital Data and Parent Star Data for: HAT-P-4__ b

quantity unit value 1-sigma uncertainty
Period days 3.0565360 0.0000570
Time of periastron HJD 2454245.8154000 0.0003000
Orbital eccentricity none 0.000 0.000
Argument of perihelion deg 90.000 0.000
Velocity half-amplitude m s^-1 81.100 1.900
Planetary mass M_Jup 0.676 ---
Stellar mass M_Sun 1.26 ---
Stellar T_eff Kelvin 5860 ---
Planetary T_eff Kelvin 1566 ---
Stellar Radius R_Sun 1.590 ---
Measured Planetary Radius R_Jupiter 1.270 ---
T_circ (w/o core) Gyr 0.157 ---
T_damp (w/o core) Gyr inf ---


Planet radii from theoretical models of:
Bodenheimer, Laughlin, and Lin 2003, Astrophysical Journal, v. 592, 555-563.

Damping timescales from:
Adams and Laughlin 2006, ApJ : link