Program: GN-2021A-DD-201

323P/SOHO belongs to the near-Sun population of small bodies, with near perihelion activity driven by mass-loss mechanism most likely drastically different from that of typical comets, and therefore is likely a unique comet throughout the whole comet population in the solar system. Previously it had never been observed from the ground due to poor viewing geometries and its highly uncertain orbit making accurate telescope pointing impossible. We now have a much better orbital solution thanks to our successful recovery of it in our preperihelion Subaru search in December 2020, where the object appeared asteroidal. However, its postperihelion morphology was found to be consistent with disintegration in the CFHT data from early February 2021. 323P thus likely becomes the first-ever short period near-Sun comet that has disintegrated. In fact, never have we observed objects of similar kind postperihelion, and so we do not know how their activity will behave. The possible disintegration of 323P is now offering us an unprecedented opportunity to study a near-Sun comet in great detail as well as to constrain properties of its interior before disintegration. The current debris are interior materials freshly exposed to sunlight less than a month. We request DD time to observe the disintegrating comet using broadband g'r'i' filters with GMOS-N at Gemini North. Our primary objectives are to (1) monitor the development of the disintegration, and (2) to obtain the spectral reflectivity with the multiband colours.