MDM Observatory 2.4m Telescope Observing Report for 2021 Dec 11 Observer(s): Thorstensen, Garcia-Soto, and students Institution(s): Dartmouth Instrument: OSMOS+B4K Worked for 13 hours (all night) Conditions were Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 1.5 arcsec, Clear, Winds Light & Variable Mid: Seeing 1.5 arcsec, Clear, Winds Calm End: Seeing 1.5 arcsec, Clear, Winds Calm Observing Summary: Best night so far, photometric with decent seeing all night long. Everything worked well with no issues. Well, one tiny issue -- the TCS continues to report the south mirror cover is closed when it isn't. ------------------------------ Submitted on 2021 Dec 12 [7:04:08]