NGC 6946 - Fireworks Galaxy (Kurt Zeppetello)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Fireworks Galaxy · NGC 6946

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NGC 6946 - Fireworks Galaxy

Link: http://astroquest1.blogspot.com/

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NGC 6946 - Fireworks Galaxy

Link: http://astroquest1.blogspot.com/

NGC 6946 a.k.a. The Fireworks Galaxy is described as a face-on intermediate spiral galaxy bordering Cepheus and Cygnus at a distance 25 million light-years. It is approximately 40,000 light-years across and contains about 100 billion stars. Although it has a small bright nucleus, the galaxy as a whole is very faint as it is close to the galactic plane of the Milky Way. I could barely see it in subframes during imaging. It is classified as a starburst galaxy (star-forming) due to its high rate star formation. It has ten times the star formation as the Milky Way yet is half the size hence the Fireworks nickname. The arms contain many dense areas where star-formation is occurring - the upper-left arm shows a very prominent region where it is occurring.

This is my second image with the new setup (Edge & ASI294MC) and is the first time I ever imaged this object. It was a bit tough to process given the great amount of stars and galactic material in between it and us so a lot of star reduction was in order. I learned a lot since my previous image about this setup and the Asiair so, hopefully there is improvement. I did add another ~1.5mm to the backspace and the stars were not as elongated in the corners on the uncropped raw data. I did try adding 4.5mm for my latest object but that is in process. I believe I have decent autofocus settings now as I get a good V-curve and also checking and performing the collimation is easier now.

I also used the Baader Neodymium Moon & Skyglow filter rather than a plave UV/IR filter since the moon was starting to show itself. I also used the Deep Sky Stacker as PI was giving me horrible results with this camera and flats. I'll have more to say on this issue at a later date!

Imaged with APT
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Status	Advanced success
Started	...
Astrometry.net job	4789805
PixInsight job	3024G1V3OH99MCDSGSUIRDBUD05B4WSX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h34m51s.700
RA (top/left)	20h32m45s.204
RA (top/right)	20h36m32s.800
RA (bottom/right)	20h36m58s.710
RA (bottom/left)	20h33m07s.886

Dec (center)	+60°08′41″.16
Dec (top/left)	+59°59′32″.83
Dec (top/right)	+59°55′42″.40
Dec (bottom/right)	+60°17′43″.23
Dec (bottom/left)	+60°21′36″.49

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NGC 6946 - Fireworks Galaxy

NGC 6946 - Fireworks Galaxy

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NGC 6946 - Fireworks Galaxy

NGC 6946 - Fireworks Galaxy

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