Orbital Data and Parent Star Data for: 55cancri_ e

quantity unit value 1-sigma uncertainty
Period days 2.8173000 0.0002200
Time of periastron HJD 2453498.8010000 0.3000000
Orbital eccentricity none 0.174 0.140
Argument of perihelion deg 236.500 38.000
Velocity half-amplitude m s^-1 5.500 0.800
M*sin(i) M_Earth 11.612 ---
Stellar mass M_Sun 0.95 ---
Stellar T_eff Kelvin 5250 ---
Planetary T_eff Kelvin 1173 ---
Stellar Radius R_Sun 0.950 ---
Predicted Planetary Radius (w/o core) R_Jupiter 0.226 ---
T_circ (w/o core) Gyr 0.845 ---
T_damp (w/o core) Gyr 13.534 ---


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