MDM Observatory 2.4m Telescope Observing Report for 2012 Dec 19 Observer(s): Haojing Yan & Zhiyuan Ma Institution(s): University of Missouri-Columbia Instrument: OSMOS + B4K Worked for 10.5 hours (all night) Conditions were Non-Photometric most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Beg: Seeing 4 arcsec, Clear, Winds Moderate Mid: Seeing 2-3 arcsec, Clear, Winds Moderate End: Seeing 2 arcsec, Clear, Winds Moderate Observing Summary: Overall clear night. However the seeing condition was still rather poor and we had to adjust the focus frequently. Soon after the night began, Prospero could not talk to filter1. We tried to fix the problem, but it happened again very soon. As we were using only one filter and we were sure that it was in place, we did not further attempt to fix it. We lost about 20 minutes to this problem. ------------------------------ Submitted on 2012 Dec 20 [7:23:14]