The Crescent Nebula

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NGC 6888 - The Crescent Nebula - Emission Nebula in Cygnus

by Bob and Janice Fera

Officina Stellare RC-360AST 14" f/8 Ritchey Chretien Cassegrain
with two-element field flattener

Apogee Alta U16M CCD Camera

Astrodon Filters

Ha-OIII-RGB Composite - 300:390:35:35:35 minutes

Sub Exposures: Ha:10x30m OIII:13x30m RGB:7x5m

Image acquired with CCDAutopilot

Processed in CCDstack and Adobe Photoshop

Taken June 21-24, 2014 from Eagle Ridge Observatory, Foresthill, CA


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