- Article
Orbital Parameters and Planetary Radius of 55 Cancri e from TESS Data
- David Joffe and
- Matt Bonvissuto
A large number of transits have been observed by TESS from the rapidly orbiting exoplanet 55 Cancri e. This amount of transit data, combined with the relatively high frequency of TESS observations, allows for a direct measurement of not only the planetary radius and orbital parameters but also the limb darkening coefficients of the host star. We obtain a planetary radius of earth radii, an orbital radius of AU, and an orbital inclination of degrees. For the quadratic limb darkening coefficients and we report measurements of
and
, and discuss strategies to reduce the uncertainty in the measurement. We also measured the curvature of the transit depth as a function of time using an effective parametrization
, and found
in units of relative intensity per day squared. This parametrization resulted in a higher goodness-of-fit value than the quadratic model, with a reduced of 1.153 rather than 1.201 for the quadratic model, and a of 31.75 in favor of the effective parametrization.
6 February 2026


