Quote:
Originally Posted by Merlin66
Field contrast and attention can easily get you down in visual magnitude.
I used x180 on SuperNovae search and regularly got down to 15.5mag with a 12" Newt.
Remember a lot of the time Herschel was just sweeping and recording "on the run" so I would have thought his WML would have been lower than a dedicated amateur purposely looking for/ observing a known object.
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Yes that is the point, he was "on the run" and only had a short time to look at each object. Thanks for the mag 15.5 observation.