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Contains:  M 16, Eagle nebula, NGC 6611
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M16: Eagle Nebula (Ha-SII/OII-SII/OIII), 


            Chris Sullivan
M16: Eagle Nebula (Ha-SII/OII-SII/OIII)

M16: Eagle Nebula (Ha-SII/OII-SII/OIII)

Technical card

Resolution: 3473x2420

Dates:June 5, 2018June 8, 2018June 12, 2018June 15, 2018June 16, 2018June 17, 2018June 18, 2018June 25, 2018June 26, 2018June 27, 2018June 30, 2018July 1, 2018July 2, 2018July 3, 2018July 9, 2018July 10, 2018

ZWO H-alpha 7nm: 118x300" (gain: 139.00)
Baader IR-Cut Moon & Skyglow Neodymium: 1628x1" (gain: 389.00)
Baader IR-Cut Moon & Skyglow Neodymium: 730x5" (gain: 389.00)
OIII: 163x300" (gain: 139.00)
ZWO SII 7nm: 138x300" (gain: 139.00)

Integration: 36.4 hours

Avg. Moon age: 15.72 days

Avg. Moon phase: 51.54%

Bortle Dark-Sky Scale: 8.00 job: 2181795

RA center: 274.719 degrees

DEC center: -13.837 degrees

Pixel scale: 0.481 arcsec/pixel

Orientation: 358.377 degrees

Field radius: 0.283 degrees

Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States

Data source: Backyard


Ha-SII/OII-SII/OIII: 90%-10%/80%-20%/100%

I generally prefer the bicolor (or a modified bicolor) palette to SHO, because HOO is generally closer to true color and SHO can sometimes be too green or yellow for my tastes. However, I do think the SHO version ( came out markedly better. Still glad I tried.



Chris Sullivan
License: None (All rights reserved)


  • M16: Eagle Nebula (Ha-SII/OII-SII/OIII), 


            Chris Sullivan
  • Final
    M16: Eagle Nebula (Ha-SII/OII-SII/OIII), 


            Chris Sullivan



Sky plot

Sky plot


M16: Eagle Nebula (Ha-SII/OII-SII/OIII), 


            Chris Sullivan