Jupiter: Io shadow transit
Caught the shadow of Io crossing the North Equatorial Belt. Crisp black dot at 200x once the tube cooled down.
Observing log
Albireo and other autumn doubles
A short tour of colourful double stars before Cygnus sinks into the western haze.
Collimating the Dob, again
Barlowed laser, a Cheshire eyepiece and twenty minutes of swearing. Star test looks much better now.