Thor's Helmet

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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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