MDM Observatory 2.4m Telescope Observing Report for 2017 Dec 21 Observer(s): Weil, Fesen, Gasque, Sosanya Institution(s): Dartmouth Instrument: OSMOS/B Worked for 12 hours (all night) Conditions were Photometric most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 2 arcsec, Clear, Winds Moderate Mid: Seeing 3 arcsec, Clear, Winds Light & Variable End: Seeing 1 arcsec, Clear, Winds Light & Variable Observing Summary: Mostly clear but seeing turned bad (> 3 ) for about 1.5 hrs during the night and only slowly improved to ~1 by 5 am. ------------------------------ Submitted on 2017 Dec 22 [7:35:52]