MDM Observatory 2.4m Telescope Observing Report for 2019 Jan 02 Observer(s): Li Jiangtao Institution(s): University of Michigan Instrument: OSMOS/MDM4K No Observing (see comments below) Bad weather most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: High Humidity all night. Observing Summary: The humidity is high almost all the night. It gets better after 4am, so we tried to starting observing. But the mirror cover cannot be open. We can hear some sound, but the cover simply does not stand up. We tried a few times, and it still cannot open, so have to stop observing. The instrument is not rotated back as the mirror cover cannot be open. We tried to open the mirror cover just about one hour before opening the dome, it works! It also worked when we rotating the instrument. ------------------------------ Submitted on 2019 Jan 3 [5:04:06]