The first night of our planned instrument engineering/commissioning is not going to go well I feel. The sky was covered with thick cirrus on the drive to the summit and the satellite images are showing even thicker clouds on the way. There is some closed-dome testing we can do but it will be a short night. We're currently trying to acquire a 5th magnitude star which should literally be burning a hole in the detector's array, but we can hardly see it.
The sunset was beautiful although I didn't have much time to take photos this evening.