This morning saw unusually good seeing for this location. The diffraction pattern of Aldrebaran which I use to collimate with on screen looked almost perfect. Unfortunately there was cloud as Jupiter culminated at midnight, and it took a long time to move off. The beautiful filigree patterns in the cirrus illuminated by the moonlight, with a rainbow halo around the Moon, showed the stability of the high atmosphere. At 1am the cirrus patterns disappeared and the entire sky fugged over with a mist, but I kept monitoring Jupiter, and it cleared at 01:15 with seeing still good.