Earth-sized planet with orbital period of 4.3 hrs discovered

Astronomers have discovered an Earth-sized exoplanet with an orbital period of four hours and 20 minutes, the second-shortest of a planet known to date. The planet, named EPIC 228813918 b, is slightly smaller than the Earth with an estimated mass which is almost 70% of Jupiter's. Notably, the planetary system is located some 310 light years away from the Earth.