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Contains:  NGC 6910, gamma Cyg nebula, IC 1318, The star Sadr (γCyg)
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IC 1318 Butterfly Nebula in BiColor Ha & OIII, 


            Douglas J Struble
IC 1318 Butterfly Nebula in BiColor Ha & OIII

IC 1318 Butterfly Nebula in BiColor Ha & OIII

Technical card

Resolution: 3452x4315

Dates:Aug. 5, 2018Aug. 9, 2018

Astrodon Ha 5nm: 91x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 92x240" (gain: 139.00) -20C bin 1x1

Integration: 12.2 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 25.10 days

Avg. Moon phase: 23.81%

Bortle Dark-Sky Scale: 6.00 job: 2194516

RA center: 306.183 degrees

DEC center: 40.186 degrees

Pixel scale: 2.310 arcsec/pixel

Orientation: 120.938 degrees

Field radius: 1.773 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


The Sadr region, or IC 1318, is the diffuse emission nebula surrounding Sadr or Gamma Cygni. Sadr lies in the center of Cygnus's cross. The Sadr region is one of the surrounding nebulous regions; others include the Butterfly Nebula and the Crescent Nebula. It contains many dark nebulae in addition to the emission diffuse nebulae.

Sadr itself has approximately a magnitude of 2.2. The nebulous regions around the region are also fairly bright.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


IC 1318 Butterfly Nebula in BiColor Ha & OIII, 


            Douglas J Struble