MDM Observatory 2.4m Telescope Observing Report for 2025 Dec 12 Observer(s): John Thorstensen Institution(s): Dartmouth Instrument: OSMOS Worked for 10 hours (all night) Conditions were Non-Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 1+ arcsec, Cirrus, Winds Light & Variable Mid: Seeing 1+ arcsec, Cirrus, Winds Light & Variable End: Seeing 1+ arcsec, Cirrus, Winds Light & Variable Observing Summary: Cirrusy all night, but thin enough to work through. Closed at 4 AM to drive students to the airport. ------------------------------ Submitted on 2025 Dec 13 [8:09:40]