MDM Observatory 2.4m Telescope Observing Report for 2025 Dec 22 Observer(s): Meghna Sitaram, David Schiminovich Institution(s): Columbia Instrument: CHaS Worked for 12 hours (all night) Conditions were Non-Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Cirrus, Winds Calm Mid: Patchy Clouds, Winds Calm End: Patchy Clouds, Winds Calm Observing Summary: Continued testing our new high-resolution mode on-sky. Collected images of various galaxy and nebula targets. Some patchy clouds at different points throughout the night. Telescope and instrument (and operators) performed nominally. ------------------------------ Submitted on 2025 Dec 23 [6:28:25]