Astronomers report discovery of the closest ultrastripped supernova: SN 2021agco in UGC 3855

Astronomers report the discovery of a new ultrastripped supernova in the galaxy UGC 3855. The supernova was detected using the Half Meter Telescope (HMT) at the Xingming Observatory in China. The finding was detailed in a paper published October 7 on the pre-print server arXiv.