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.
Click on image below for full size
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