ASU Nexus for Exoplanet System Science

Trappist-1h Orbital Period Confirmed to be 19 Days

Credit: NASA/JPL-Caltech

Trappist-1 was examined by Kepler from December 15, 2016 to March 4, 2017 and the information was given out to the scientific community to examine.  Within two hours of the data being released it was confirmed that the outermost planet Trappist-1h has an orbital period of 19 days.  It was earlier modeled to have a period of 19 days using resonance information from the other planets to model its orbit, but with the release of the raw data this prediction was confirmed.  This planet is far out of the habitable zone and receives as much energy from Trappist-1 as Ceres does from our own sun with this measured orbital period and low luminosity of the dwarf star.  With this information, resonances can be calculated and the formation of this intriguing system can be further studied.

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