MDM Observatory 2.4m Telescope Observing Report for 2012 Sep 13 Observer(s): Kayhan Gultekin and Ed Cackett Institution(s): U. Michigan, Wayne State U. Instrument: ModSpec+Nellie Worked for 6 hours (first half of the night) Conditions were Non-Photometric most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: High Humidity from 01:00 until 06:00. Beg: Seeing 1.5 arcsec, Cirrus, Winds Calm Mid: Seeing 1.5 arcsec, Clear, Winds Calm End: Clear, Winds Calm Observing Summary: Clear weather. High humidity. We had to close the mirror covers at 01:00 due to humidity in the dome that reached 94% and stayed above 85% for the rest of the night. We had to restart OWL in order to communicate with the CCD. Once we did that, there were no problems, except that OWL could not read the CCD temperature. This did not prevent us from observing and was only a minor issue. ------------------------------ Submitted on 2012 Sep 14 [4:18:16]