Orbital Data and Parent Star Data for: XO-2_____ b

quantity unit value 1-sigma uncertainty
Period days 2.6158380 0.0000080
Time of periastron HJD 2454147.7490200 0.0002000
Orbital eccentricity none 0.000 0.000
Argument of perihelion deg 90.000 0.000
Velocity half-amplitude m s^-1 85.000 8.000
Planetary mass M_Jup 0.569 ---
Stellar mass M_Sun 0.98 ---
Stellar T_eff Kelvin 5340 ---
Planetary T_eff Kelvin 1218 ---
Stellar Radius R_Sun 0.960 ---
Measured Planetary Radius R_Jupiter 0.964 ---
T_circ (w/o core) Gyr 0.066 ---
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