MDM Observatory 2.4m Telescope Observing Report for 2016 Nov 24 Observer(s): Jaejin Shin Institution(s): Seoul national University Instrument: OSMOS Worked for 13 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 1.5 arcsec, Clear, Winds Calm Mid: Seeing 1.7 arcsec, Clear, Winds Moderate End: Seeing 2 arcsec, Clear, Winds Calm Observing Summary: The weather was not bad except for moderate wind which affects guiding. As reported in trouble report, I found high background counts (~7000) around 2am. It turned out to be high CCD temperature (~-30). Since I totally filled nitrogen 5:30pm, I do not understnad why this happens. ------------------------------ Submitted on 2016 Nov 25 [7:14:30]