Yes this is just meant to be a light hearted challenge, and I chose the Ghost of Jupiter as being bright, it doesnt unfairly disadvantage city observers, and the necessary data can be obtained in a reasonable amount of time.
Good image there Mike, yes I should have imaged it without a filter to get more colour difference.
PW could be right, webcams might rule the day (or night I should say) here.
We used to have a montly challenge in IIS where an object would be nominated and images submitted
Scott