DM Ori: A Young Star Occulted by a Disturbance in its Protoplanetary Disk

In some planet formation theories, protoplanets grow gravitationally within a young star's protoplanetary disk, a signature of which may be a localized disturbance in the disk's radial and/or vertical structure. Using time-series photometric observations by the Kilodegree Extremely Little Telescope South (KELT-South) project and the All-Sky Automated Survey for SuperNovae (ASAS-SN), combined with archival observations, we present the discovery of two extended dimming events of the young star, DM Ori. This young system faded by \(\sim\)1.5 mag from 2000 March to 2002 August and then again in 2013 January until 2014 September (depth \(\sim\)1.7 mag). We constrain the duration of the 2000-2002 dimming to be \(