MDM Observatory 1.3m Telescope Observing Report for 2010 Nov 22 Observer(s): Ondrej Pejcha Institution(s): Ohio State University Instrument: CCDS Worked for 8.5 hours (all night) Conditions were Mixed most of the night. No equipment or software problems were encountered. Seeing and Weather: High Humidity from 9pm until 10.30. Beg: Seeing 1.2 arcsec, Clear, Winds Light & Variable, high humidity Mid: Seeing 1.3 arcsec, Clear, Winds Light & Variable End: Seeing 1.8 arcsec, Clear, Winds Light & Variable Observing Summary: Observing for the reverberation campaign. The evening started well with no clouds, but humidity at about 60%. The humidity steadily increased and at about 9pm I noticed condensation on the van. Although the official humidity was 81%, I closed. I reopened after about 1h30m when humidity dropped down enough. The humidity was then dropping further throughout the night. Due to the humidity interruption I couldn't observe Mrk 335. ------------------------------ Submitted on 2010 Nov 23 [6:13:18]