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Old 20-07-2024, 03:36 PM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,625
M17 A Black and White Swan

Other than the 90% Moon , I had some great conditions again on Thursday night, clear, low humidity, very cold (got to -5C) and very stable atmosphere for most of the night, with excellent seeing, average raw FWHM from 7:30pm - 11:30pm sat very steady between 1.6" - 1.8" then after I'd crossed the meridian and flipped, it deteriorated slowly to about 2.3" as the western horizon approached. I had a couple of technical glitches during the night (a rare occurrence for me) but all sorted (?) and never the less, managed to still collect almost 5hrs of useable Halpha data. I used the best 3.5hrs or so (FWHM < 1.8") for the brightest areas and the entire 4.7hrs for the outer regions, to get a little deeper in these areas

Can't wait to get the rest of the NB and colour data next clear night

A Black & White Swan

Mike
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