NGC 40 (Caldwell 2), The 'Bow Tie nebula'
There are quite a few planetary nebulae in the Cygnus/Cepheus area, and
I was scanning through them one night when I came across this one, which
looked worthy of closer inspection.
As it's pretty small, I used a 2x Barlow lens to increase my focal length
to F16, and shot some 4 minute subs of it (seeing was pretty bad, and
4 minute subs were about the longest I could go without too much blurring
at 2400mm focal length).
At that focal ratio, my 6 inch scope is very slow, so what I caught was
pretty faint and I didn't catch any of the fainter nebulosity, so I may
well revisit this object with a larger scope at a later date.
It is about 1 light year across, and lies 3500 light years away from us,
in the constellation of Cepheus.
It was discovered by Sir William Herschel in 1788.
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Click on image below for full size
version
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Imaged with a TMB 152 @ F16 & Atik 16HR (Televue 2x Barlow lens used)
A H-alpha luminance layer was used.
Ha x 10, R x 11, G x 11, B x 17.
All subs 4 minutes.
Total imaging time. 3 hrs 16 minutes.
Imaged on the 30th August 2010
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