MDM Observatory 2.4m Telescope Observing Report for 2025 Dec 19 Observer(s): Meghna Sitaram, David Schiminovich Institution(s): Columbia Instrument: CHaS Worked for 10 hours (all night) Conditions were Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Clear, Winds Calm Mid: Clear, Winds Calm End: Clear, Winds Calm Observing Summary: FanCHaStic first night! We brought one of the new narrowband filters ordered for MDM and spent some time installing the filter in CHaS at the beginning of the night. Opened around 8PM to great weather and got some nice data on some galaxies and nebulae with the new filter. ------------------------------ Submitted on 2025 Dec 20 [6:57:46]