The Eskimo nebula is a fine object for each size of optical instrument. For this observation I’ve used an 11” SCT and have noticed the fine detailed structures within this planetary nebula for the first time – using averted vision, high magnification of 600x and an excellent UHC filter.
• Eskimo Nebula (NGC 2392 / Caldwell 39) in Gemini
• Object Type: planetary nebula
• Location: Mechelen – Belgium (NELM 5.5)
• Date: 21st February 2014 – 21h37 UT
• Optics: Celestron CGEM C11 – ES82 4.7mm (600x) – Astronomik UHC filter
• Seeing: moderate, transparency good.
• Media: graphite pencil on white, scanned and inverted (GIMP2)
Central star is easily direct visible within a round glow. Using averted vision a near-circular ring is clearly visible with some hints of variable brightness. The outer halo becomes gradually fainter and mottled using averted vision, containing some arc-like structures. Impressive view!