MDM Observatory 2.4m Telescope Observing Report for 2025 Dec 10 Observer(s): John Thorstensen Institution(s): Dartmouth Instrument: OSMOS 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 0.7 arcsec, Clear, Winds Calm Mid: Seeing 1 arcsec, Clear, Winds Calm End: Seeing 1.2 arcsec, Clear, Winds Calm Observing Summary: Beautiful weather continues, perfectly clear all night with some spectacular (0.7 arcsec) seeing briefly at the start. Softened some through the night but generally good. Very productive. Almost no wind. ------------------------------ Submitted on 2025 Dec 11 [7:17:07]