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Old 11-05-2009, 10:11 PM
tornado33
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Join Date: Jan 2005
Location: Newcastle, NSW, Australia
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He2-72 Planetary nebula

After seeing Tom Davis' fantastic 23 hour narrowband image of IC 2948, he pointed out that there was a planetary nebula clearly visible in the image, PK294-00 1 also known as HE2-72, so earlier tonight I imaged it with the 10 inch scope.

7x10 mins ISO 400. I used the Baader UHCS and IDAS UV/IR filter rather than the IDAS LPS filter as the UHCS is a more severe filter, suited to imaging under such bright moonlit skies. Hutech Modded 350D, 10 inch f5.6 Newtonian, off axis hand guided with Q guider cam as usual

The first few subs were darker as there was a gap from astronomical twilight till moonrise. The last few subs were brighter but still usable. With the more severe nebula filters like the UHCS, DSO imaging (emission line nebulae) is definately possible with full or near full moon about.

Full size image here
Theres some red nebulosity from nearby IC 2948 in the background.
Scott
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