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NGC 2359 - Thor's Helmet - Emission Nebula in Canis Major
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 - 420:300:70:70:70 minutes
Sub Exposures: Ha:14x30m OIII:10x30m RGB:14x5m
Image acquired with CCDAutopilot
Processed in CCDstack and Adobe Photoshop
Taken January 17-22, 24-26, 2014 from Eagle Ridge Observatory, Foresthill, CA
NASA Astronomy Picture of the Day Feb. 15, 2014
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