found
Scientists have managed to find a new exoplanet of the terrestrial type in the ultrashort period. It was called EPIC 228813918 b. The planet manages to complete the orbital path in 4 hours and 20 minutes, due to which it is ranked second in terms of brevity of the orbital period.
A signal about the planet appeared on the radar of the Kepler telescope during the mission in 2016. Subsequent studies have eliminated the possibility of the binary star. For analysis, the Subaru telescope, the HIRES instrument of the Keck Observatory, as well as the K2 light curve, radial velocities and archive images were used to prove that EPIC 228813918 is a transit planetary system.
Archived images of EPIC 228813918 show the correct movement for 60 years (data for 1954, 1992 and 2012). The position of the object is indicated by a red grid. The blue on the left panel is the position of the star. A green rectangle indicates the size of the photometric aperture. The new object is smaller than the Earth (only 0.89 of its radius), but exceeds the massiveness (0.7 mass of Jupiter). The exoplanet rotates around the M-dwarf (half the size and mass of the Sun). Also managed to find out the chemical composition. The minimum dose of iron mass is 0.52. This is higher than Earth, Venus and Mars, but inferior to Mercury.
Detections of systems with short periods are important because they help limit theories of planetary formation.
