Contains:  M 16, Eagle nebula, NGC 6611
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Eagle Nebula SHO, 





    
        

            Jacky Tian
Eagle Nebula SHO

Eagle Nebula SHO

Technical card

Resolution: 2023x2048

Dates:June 12, 2018

Frames: 58x1200"

Integration: 19.3 hours

Avg. Moon age: 28.01 days

Avg. Moon phase: 2.60%

Astrometry.net job: 2142695

RA center: 274.647 degrees

DEC center: -13.853 degrees

Pixel scale: 3.178 arcsec/pixel

Orientation: 1.001 degrees

Field radius: 1.271 degrees

Locations: Deep Sky West, Rowe, NM, United States

Data source: Amateur hosting facility

Description

Eagle Nebula in SHO, presented with an almost complete star removal. I'll upload the version with RGB stars later. This version looks better scaled down IMO, but at full-res the RGB stars version is obviously a lot better, since here all the smudges and artifacts from star removal are pretty noticeable when you start to pixel peep.

This time I removed stars from each of the linear masters (with MMT/morpho) before combining into Hubble palette. Synthetic luminance frame was a mix of Ha at 100% and S at 60% via SHO-AIP. I substituted RGB stars for some particularly smudgy ones around the frame with clone stamping on this version at the very end.

I generally prefer the look of narrowband nebulae without stars, but I'm finding it tough to actually nuke all the stars without introducing nasty artifacts. I've been playing with a bunch of different techniques as I've been learning PI, but I haven't found anything so far that passes pixel peeping.

Comments

Author

xjtian
Jacky Tian
License: None (All rights reserved)
720
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Revisions

  • Eagle Nebula SHO, 





    
        

            Jacky Tian
    Original
  • Final
    Eagle Nebula SHO, 





    
        

            Jacky Tian
    B

B

Applying HSL (oops)

Sky plot

Sky plot

Histogram

Eagle Nebula SHO, 





    
        

            Jacky Tian