Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  3 eta Cep  ·  B148  ·  B149  ·  B150  ·  B152  ·  Fireworks Galaxy  ·  NGC 6946  ·  Sh2-129  ·  The star ηCep  ·  VdB140
Getting plate-solving status, please wait...
Squid in a Flying bat, Dark Seahorse nebula and the Fireworks galaxy, 



    
        

            Sendhil Chinnasamy
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Squid in a Flying bat, Dark Seahorse nebula and the Fireworks galaxy

Getting plate-solving status, please wait...
Squid in a Flying bat, Dark Seahorse nebula and the Fireworks galaxy, 



    
        

            Sendhil Chinnasamy
Powered byPixInsight

Squid in a Flying bat, Dark Seahorse nebula and the Fireworks galaxy

Imaging telescopes or lenses: TAKAHASHI FSQ-106ED

Imaging cameras: QHYCCD QHY600M

Mounts: ASTRO-PHYSICS AP900 CP4

Guiding telescopes or lenses: Skywatcher Evoguide 50ED

Guiding cameras: ZWO 290MM Mini

Focal reducers: Takahashi 0.6X F/3 Reducer

Software: Adobe Photoshop CS4 Photoshop CS4  ·  Pleaides Astrophoto PixInsight 1.8.8-6

Filters: Chroma Blue 50mm  ·  Chroma Green 50mm  ·  Chroma Red 50mm  ·  Chroma Luminance 50mm  ·  Chroma Ha 3nm 50mm  ·  Chroma 3nm Oiii 50mm

Accessory: Prima Luce Lab EagleLE  ·  Optec ThirdLynx DirectSync SVX30  ·  Optec Alnitak Flip-Flat Flat Fielder  ·  ZWO filter wheel


Dates:Sept. 3, 2021Sept. 4, 2021Sept. 8, 2021Sept. 9, 2021Sept. 10, 2021Sept. 11, 2021

Frames:
Chroma 3nm Oiii 50mm: 100x900" (25h) (gain: 26.00) -5C bin 1x1
Chroma Blue 50mm: 12x600" (2h) (gain: 26.00) -5C bin 1x1
Chroma Green 50mm: 12x600" (2h) (gain: 26.00) -5C bin 1x1
Chroma Ha 3nm 50mm: 36x900" (9h) (gain: 26.00) -5C bin 1x1
Chroma Luminance 50mm: 66x600" (11h) (gain: 26.00) -5C bin 1x1
Chroma Red 50mm: 12x600" (2h) (gain: 26.00) -5C bin 1x1

Integration: 51h

Darks: 25

Flats: 25

Flat darks: 25

Avg. Moon age: 10.95 days

Avg. Moon phase: 11.74%

Bortle Dark-Sky Scale: 4.00


RA center: 20h59m10s.490

DEC center: +60°3855.50

Pixel scale: 5.750 arcsec/pixel

Orientation: 1.781 degrees

Field radius: 3.798 degrees

More info:Open 


Resolution: 3987x2596

Data source: Backyard

Description

This target (or the field of view) gave me quite the run around during processing. While the data collection was fairly easy and I was happy with the results I got when testing HOO and LRGB separately, when I tried to blend all the channels together (using the method tried on my M31), I was not getting the results that I was after. 

I collected O3 first and could see faint signal on what it looked to be a spiral galaxy and was hoping it won't make the cut when cropping. It made through, got to take care of the little guy!

After several revisions and testing it, I think I am done with this. 

The focus of this image to me was the squid, but I think I bit more than I chew thinking I can shoot 25h of O3 and about 10 hours of Ha and be done with it. Seeing the dark seahorse and the galaxy made me realize I needed to shoot LRGB channels as well and processing this gave me the run around. My initial versions were more focused on getting all the Ha and O3 and I lost the dust details along the way and the fireworks galaxy blew up in the details. So had to sit back and realize how I wanted to show the final result as. In my mind, I wanted to show a little of everything, the squid, Ha signal, dust and some details on the galaxy. 

L channel:
Mure Denoise at a variance scale of 0.15
DBE
Deconvolution
Histogram Stretch

RGB channels: 
Mure Denoise at a variance scale of 0.15
DBE
Linear Fit to Blue
RGB using Channel combine
Histogram Stretch
LRGB combination of L

Ha & O3 channel:
Mure Denoise at a variance scale of 0.15
DBE
Histogram Stretch

Using PixelMath, extracted the Ha and O3, and iteratively blended onto the LRGB image (I could not get it work in linear state and quit after trying a few days, I probably should revisit my M31 now). 

LRGBHaO3:
TGV Denoise
Enhance squid region
Adjust colors using masks and Curves Saturation
Reduce Chromatic noise using MLT
Demphasize stars using starless version
Sharpen using MLT

Hope you like this result! Clear skies!

Comments

Sky plot

Sky plot

Histogram

Squid in a Flying bat, Dark Seahorse nebula and the Fireworks galaxy, 



    
        

            Sendhil Chinnasamy