20211008 - NGC 6946 CEP Fireworks Galaxy and NGC 6939 - Fireworks display in the sky
What’s in the picture(s)
NGC 6946 CEP Fireworks Galaxy -
https://en.wikipedia.org/wiki/NGC_6946NGC 6939 DEP Open Cluster -
https://en.wikipedia.org/wiki/NGC_6939Quote “NGC 6946, sometimes referred to as the Fireworks Galaxy, is a face-on
intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the
northernconstellations of
Cepheus and
Cygnus. Its distance from Earth is about 25.2 million
light-years similar to the distance of
M101(NGC 5457) in the
constellationUrsa Major.
This well-studied galaxy has a diameter of approximately 40,000 light-years, about one-third of the Milky Way's size, and it contains roughly half the number of stars as the Milky Way. It is heavily obscured by
interstellar matterdue to its location close to the
galactic plane of the Milky Way.”
Quote “NGC 6939 is an
open cluster in the constellation
Cepheus. It was discovered by
William Herschel in 1798. The cluster lies 2/3° northwest from the spiral galaxy
NGC 6946. The cluster lies approximately 4.000 light years away and it is over a billion years old.”
What was the experience
Although Nebula-season is still on-going, there are also a couple of important galaxies visible at this moment. Before it moves out of sight from where I observe, I also wanted to catch out NGC 6946, smaller compared M31 and M33, but just as important
Learning and improving on the LRGB-skills, while getting more familiar with the TS140 scope, NGC 6946 is big enough in preparation for M101, M81, M51 later this year.
How it was done
Scope: TS-140 APO (FL 910mm / with x1.0 flattener)
Mount: CEM70G
Camera: ASI2600MM Pro
Guiding: @zwoasi OAG, ASI174MM, ASIAIR Pro
Filter: ZWO EFW - RGB/SHO Baader
Resolution: 0,85”/pixel, FoV 107’
Moon: 91%(-), Bortle 5/6 SQM 19.60
Photons: Gain 100 -10c 300s LRGB 9x 18x 18x 15x
Processing: PixInsight (Mac)
Astrobin:
What have I learned from this
The more I improve the processing skills, the more I notice that some steps/manipulations are dependant on a case by case basis. With each step, there are many side-roads to venture out on with different manipulations, different settings, all yielding another look and feel to the image. It’s a matter of choice what manipulations to pick, and hoping that a “new revision later on” will be permitted by time. There isn’t a ‘single’ outcome, it’s just the road you take that is important.
Happy with what I am learning …. 🤩
Clear Skies everybody! 🤩✨🔭
Follow me @astrowaut
Astrobin:
https://www.astrobin.com/users/WCA65/
Comments