ProtoJeb21

The more I scour K2 data for signs of transiting exoplanets, the more horrors of the Universe I stumble across. My shortest-period object I had ever found was known as EPIC 248793536.01, a likely planet candidate orbiting an orange dwarf around 60-65% the size of the Sun. This nearly impossible object was over twice the size of Earth and took only 0.303595 days to orbit its star. That's only 7.29 hours! I thought that there would be no way I would find anything in a shorter orbital period than that.

Fast forward to today, and I'm proven wrong, with an eclipsing binary that orbits every...THREE HOURS.

https://www.zooniverse.org/projects/ianc2/exoplanet-explorers/talk/821/573683