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I was reading YankeeJeff's post about trying to find M33 from Brooklyn. It got me thinking about my stargazing experience Tuesday night. Mag 4.5 sky, kind of hazy. I was looking at M13, M11, and M22, thinking that the views were not the best I'd seen--no surprise because of the conditions. The light pollution from the nearby town was lighting up the hazy sky a bit, decreasing contrast even further. Would a LPR or other filter have helped improve the views in this case? What about in YankeeJeff's search for M33?
Thanks,
Paul

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Broadband "LPR" filters like the Lumicon Deep-sky can help globular clusters *slightly* at lower powers, but increasing the magnification can often help as much or more. On M33, a broadband filter will help its details stand out a bit better than without a filter as long as the light pollution isn't too intense. Indeed, a couple of nights ago at my dark sky site, I used the Orion Skyglow broadband filter on NGC 253, and the dark detail was definitely easier to see with the filter than without it, at least for magnification of less than 100x. Clear skies to you.

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David W. Knisely
Hyde Memorial Observatory
http://www.hydeobservatory.info
Prairie Astronomy Club
http://www.prairieastronomyclub.org

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