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Contains:  Cocoon nebula, IC 5146
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Cocoon Nebula (IC 5146), 


            Salvatore Giambruno
Cocoon Nebula (IC 5146)

Cocoon Nebula (IC 5146)

Technical card

Resolution: 1425x1255

Astrodon 3nm Ha: 25x1200" -25C bin 2x2
Astrodon 3nm SII: 39x1200" -25C bin 2x2
Astrodon OIII 1.25 5nm: 34x1200" -25C bin 2x2

Integration: 32.7 hours

Darks: ~9

Flats: ~20

Bias: ~100

Bortle Dark-Sky Scale: 8.00 job: 1782017

RA center: 328.339 degrees

DEC center: 47.262 degrees

Pixel scale: 1.175 arcsec/pixel

Orientation: 90.900 degrees

Field radius: 0.310 degrees

Locations: Home Observatory, Southern California, California, United States


The Cocoon Nebula has very little OIII content, so this image is mostly Ha and SII, with OIII thrown in to achieve a more pleasing star color balance.



Salvatore Giambruno
License: None (All rights reserved)

Sky plot

Sky plot


Cocoon Nebula (IC 5146), 


            Salvatore Giambruno