MDM Observatory 2.4m Telescope Observing Report for 2021 May 31 Observer(s): Fesen Institution(s): Dartmouth Instrument: OSMOS Worked for 7 hours (all night) Conditions were Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 1.3 arcsec, Clear, Winds Calm Mid: Seeing 1.2 arcsec, Clear, Winds Calm End: Seeing 0.9 arcsec, Clear, Winds Calm Observing Summary: Everything went smoothly until 3 am when the home/hiltner/data disk ran out of room. Had to +SWAP some files so didn't loose but one 900 sec file. Seeing was exceptional at times, down to 0.8 arcsec. ------------------------------ Submitted on 2021 Jun 1 [5:10:01]