MDM Observatory 2.4m Telescope Observing Report for 2013 Dec 12 Observer(s): Frank Institution(s): OSU Instrument: OSMOS Worked for 12 hours (all night) Conditions were Mixed most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: High Humidity from 5am until end. Beg: Seeing 1.2 arcsec, Patchy Clouds, Winds Calm Mid: Seeing 1.0 arcsec, Clear, Winds Calm End: Patchy Clouds, Winds Light & Variable Observing Summary: Encountered serious telescope problems (see separate trouble report). Minor issues : 1. prospero reports the status of Filter2 for OSMOS to be unknown, the reset command does not remedy this. As indicated in the manual (and by other observers), I will go through the power cycling tomorrow. As I could assume the slot was empty, because I had not used any filters at all, I simply ignored the error message. 2. despite the dome contactor box being perfectly aligned, the drop-out had difficulties in only coming in very intermittently When RH > 87% around 5am, I was forced to close -- and until 6:20 the humidity in the dome kept being above 90% ---> decided to call it a night. ------------------------------ Submitted on 2013 Dec 13 [6:11:02]