CTB1

Unbelievably it was clear last night – and no annoying Moon to contend with either!  But what to image?  I have the H-alpha filter in at the moment so I went for the faint supernova remnant in Cassiopeia – CTB1.  And it is faint!  However – I could actually see it on each of the half-hour subs which is more than I can say when I used straight one-shot colour (no H-alpha filter) a while ago.  On the minus side I think that I will still need about another 8-hours on this object to bring it up to New Forest Observatory quality 🙁

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