MDM Observatory 1.3m Telescope Observing Report for 2022 Apr 27 Observer(s): xiaodi Yu; liyuan Lu; tianchneg Yang Institution(s): NJU Instrument: Nellie Worked for 11 hours (all night) Conditions were Photometric most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Beg: Clear, Winds Calm Mid: Seeing 1.0 arcsec, Clear, Winds Calm End: Seeing 1.0 arcsec, Clear, Winds Calm Observing Summary: In the beginning of the observation, there are some problem in CCD,which influence the twilight flat.Luckliy it was fixed after re-open the owl. ------------------------------ Submitted on 2022 Apr 28 [5:45:21]