An international team of astronomers has detected a new brown dwarf with an ultra-short orbital period that transits an active M-dwarf star. The newfound object, designated NGTS-7Ab, turns out to be the shortest period transiting brown dwarf around a main or pre-main sequence star discovered to date. The finding is detailed in a paper published June 19 on the arXiv pre-print server.
Source:
https://phys.org/news/2019-06-ultra-short-period-brown-dwarf.html