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Messier 16 (SHO), 



    
        

            Linda
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Getting plate-solving status, please wait...
Messier 16 (SHO), 



    
        

            Linda
Powered byPixInsight

Acquisition details

Dates:
July 13, 2021 ·  July 14, 2021 ·  July 15, 2021 ·  July 16, 2021 ·  July 17, 2021 ·  July 18, 2021 ·  July 24, 2021 ·  July 25, 2021 ·  July 27, 2021 ·  July 28, 2021 ·  July 29, 2021 ·  July 31, 2021 ·  Aug. 1, 2021 ·  Aug. 2, 2021 ·  Aug. 3, 2021 ·  Aug. 4, 2021 ·  Aug. 5, 2021 ·  Aug. 6, 2021
Frames:
Astrodon H-alpha 5nm: 38×900(9h 30′) -20°C bin 1×1
Astrodon OIII 5nm: 33×900(8h 15′) -20°C bin 1×1
Astrodon SII 5nm: 35×900(8h 45′) -20°C bin 1×1
Integration:
26h 30′
Darks:
40
Flats:
44
Bias:
40
Avg. Moon age:
16.58 days
Avg. Moon phase:
45.68%

RA center: 18h18m46s.755

DEC center: -13°5411.84

Pixel scale: 0.727 arcsec/pixel

Orientation: 91.513 degrees (flipped)

Field radius: 0.565 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 3966x3951

File size: 727.2 KB

Data source: Own remote observatory

Remote source: Sierra Remote Observatories

Description

I reprocess this data with the recently learned techniques to good effect!

Here's what I did:

S, H and O masters:
dynamic crop
deconvolution
starXterminator (creating stars)
histogram transformation

SHO:
channel combination (SHO)
histogram transformation to line up peaks
extract luminance as lum
TGV Denoise
channel combination in lum
curves for contrast
pixel math in stars (max)

lum:
TGV Denoise
LHE (2 scales)
MLT sharpening

stars:
channel combination of stars created by starxtermitor (SHO)
histogram trasformation

original description for rev A below
--------------------------------------------------------
I can't really say anything about M16 that hasn't been said better elsewhere. I chose the SHO palette for this in homage to the classic Hubble Pillars of Creation image which introduced many of us to the SHO palette. Of course, our telescope can't complete with Hubble for detail but it costs an awful lot less!

Processing steps:

H:
dynamic crop
MLT noise reduction
deconvolution

O, S:
dynamic crop
MLT noise reduction
deconvolution
linear fit to H

SHO:
channel combination (SHO)
Invert, SCNR, Invert (to reduce magenta in stars)
Histogram transformation
Adam Block's star de-emphasis (two rounds)
LHE (2 scales)
Dark Structure Enhance scirpt
Curves (contrast)
Adv Sharpening
Dynamic Crop to final dimensions

Comments

Revisions

  • Messier 16 (SHO), 



    
        

            Linda
    Original
  • Final
    Messier 16 (SHO), 



    
        

            Linda
    B

B

Description: see updated main description

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 16 (SHO), 



    
        

            Linda