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“Alkor” Lacerta N25010c Newtonian, f/D = 4 SX Trius 694, Baader LRGB filter
10micron GM2000 HPS II
[OIII] 61x10min / Ha 100x10min / L 34x10min / RGB 17x10min per filter
41 h
data acquired remotely using CCD Commander
IC 443 (Jellyfish Nebula) in Gemini
Supernova Remnant
~ 50’
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Gemini
several nights in spring 2019
The true size of IC 443 is about 72 light years, the age is about 3 000 to 30 000 years.
5 000 ly