Sh2-170 Another lost on the hard drive for years

Sh-170 is an emission nebula in the northwestern corner of Cassiopeia not far south of Sh-171 on the Cepheus-Cassiopeia border. It is a round emission nebula with the open cluster Stock 18 at its center. Toward the left of the somewhat dark center is BD+63 2093p which is an 08V or 09V star. Galaxy Map says it has a mass 31 times that of the sun. There seems to be some disagreement. It is considered the illuminating star for the nebula. One distance measurement I found puts it 7500 light-years distant. The visible part of the cloud is thought to have a mass of about 900 suns give or take 10%.

This image was originally taken back in 2009, processed then forgotten. I can't find I ever posted it anyplace. I didn't have the processing tools in 2009 I do now so I reprocessed it to some extent.

14" LX200R @ f/10, L=4x10'+Ha3x30' R=2x10'+Ha3x30'*80% G=2x10' B=2x10'+Ha3x30'*20%, STL-11000XM, Paramount ME

Rick,

amazing how clearly you could show this faint nebula.
Halpha certainly helped here.

Stefan

On Mon, 05 Dec 2016 00:57:04 +0000, Mandy Liefbowitz wrote:

On Thu, 1 Dec 2016 22:10:22 +0000, WA0CKY
wrote:


Sh-170 is an emission nebula in the northwestern corner of Cassiopeia
not far south of Sh-171 on the Cepheus-Cassiopeia border. It is a round
emission nebula with the open cluster Stock 18 at its center. Toward
the left of the somewhat dark center is BD+63 2093p which is an 08V or
09V star. Galaxy Map says it has a mass 31 times that of the sun. There
seems to be some disagreement. It is considered the illuminating star
for the nebula. One distance measurement I found puts it 7500
light-years distant. The visible part of the cloud is thought to have a
mass of about 900 suns give or take 10%.

This image was originally taken back in 2009, processed then forgotten.
I can't find I ever posted it anyplace. I didn't have the processing
tools in 2009 I do now so I reprocessed it to some extent.

That is very pretty. Beautiful. You bring much beauty into the world,
thank you.

We may not thank you much nor often but we really do appreciate the
effort and dedication your work takes and we are pleased that you are
generous enough to share it with us.
Mand.

Totally agree.

--
mick

Thanks mand. and Mick
Rick