Orbit and Mass
55 Cancri b is in a short-period orbit, though not so extreme as that of the previously detected hot Jupiter 51 Pegasi b. The orbital period indicates that the planet is located close to a 1:3 mean motion resonance with 55 Cancri c, however investigations of the planetary parameters in a Newtonian simulation indicate that while the orbital periods are close to this ratio, the planets are not actually in the resonance.
In 2012, b's upper atmosphere was observed transiting the star; so its inclination is about 85 degrees, coplanar with e.
The mass is about .85 that of Jupiter.
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