The longest-period planet ever detected from the ground
A 16 Hour Transit of Kepler-167 e Observed by the Ground-based Unistellar Telescope Network
Time frames for eVscope observations of Kepler-167 e. 27 out of the 43 observations (green) were used to construct the final light curve. Vertical lines mark the predicted transit start, middle, and end times.
We report a transit detection of the long period (1,071 days) exoplanet kepler-167 e, a"jupiter analog"exoplanet orbiting a star with a period of 1,071 days, using the unistellar ground-based telescope network.
From 2021november 18 to 20, citizen astronomers located in nine different countries gathered 43 observations covering the 16 hour long transit.
Using a nested sampling approach to combine and fit the observations, we detected the mid-transit time to be utc 2021 17:20:51 with a uncertainty of 9.8 minutes, making it the longest-period planet to ever have its transit detected from the ground.
This timing measurement refines the orbit and keeps the ephemeris up to date without requiring spacetelescopes.
Amaury Perrocheau, Thomas M. Esposito, Paul A. Dalba, Franck Marchis, Arin M. Avsar, Ero Carrera, Michel Douezy, Keiichi Fukui, Ryan Gamurot, Tateki Goto, Bruno Guillet, Petri Kuossari, Jean-Marie Laugier, Pablo Lewin, Margaret A. Loose, Laurent Manganese, Benjamin Mirwald, Hubert Mountz, Marti Mountz, Cory Ostrem