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M78, 



    
        

            Steve Ludwig
Powered byPixInsight

M78

Getting plate-solving status, please wait...
M78, 



    
        

            Steve Ludwig
Powered byPixInsight

M78

Acquisition details

Dates:
Feb. 13, 2021
Frames:
94×150(3h 55′)
Integration:
3h 55′
Avg. Moon age:
1.68 days
Avg. Moon phase:
3.16%

RA center: 05h46m53s.82

DEC center: +00°0919.3

Pixel scale: 1.496 arcsec/pixel

Orientation: -56.254 degrees

Field radius: 0.507 degrees

More info:Open 

Resolution: 2026x1348

File size: 610.8 KB

Data source: Backyard

Description

Equipment

- Main scope: Bresser Messier 10" Newton (254/1270)

- Main camera: Nikon D3300 (unmodified)

- Guide scope: Orion AC 50/162 Deluxe Mini

- Guide camera: ZWO ASI 290MC

- Mount: Skywatcher EQ6-R

- Explore Scientific HR coma corrector

Acquisition

- 94 lights x 150 s = 3 h 55 min

- no dark, flat, bias frames

- no filters

- ISO 800

- Bortle 4

Processing

- stacked in DSS

-> bilinear debayer method & median kappa sigma clipping

- unmodified TIF opened in PixInsight

-> STF stretch

-> dynamic crop

-> dynamic background extraction

-> background neutralization

-> color calibration

-> histogram transformation

-> dynamic crop

-> SCNR green to remove greenish noise

-> resample 50%

-> use of starnet++ module to separate stars and background

Background

-> local histogram equalization to increase background contrast

-> range selection to create a mask of the blueish nebula regions

-> curves transformation to increase saturation of blueish regions

-> multiscale linear transform to increase detail in brighter nebula regions

-> convolution (with inverted mask) to reduce noise of darker nebula regions

-> range selection to create a mask that contains the border area of the mask used before

-> slight convulution to smoothen the transition between convoluted and non-convoluted parts of the image

Stars

-> curves transformation to increase saturation

-> ACDNR to reduce noise

-> curves transformation to reduce noise around brighter stars (lower brightness of dark regions)

-> pixel math to recombine stars and background

-> final histogram transformation to increase contrast a bit

-> saved as jpg

Comments

Revisions

  • M78, 



    
        

            Steve Ludwig
    Original
  • M78, 



    
        

            Steve Ludwig
    B
  • Final
    M78, 



    
        

            Steve Ludwig
    C

B

Description: In this revision, I performed some further noise reduction via the multiscale linear transform process in Pixinsight. Furthermore, I did some curves transformation fine-tuning to improve color and brightness a bit.

Uploaded: ...

C

Description: In this revision, I increased the saturation a bit and performed another run of slight ACDNR to reduce star artifacts.

Uploaded: ...

Sky plot

Sky plot

Histogram

M78, 



    
        

            Steve Ludwig