Abell 21, also known as the
Medusa nebula, is found in the constellation of Gemini. It is a large
planetary that is also very faint. This image was taken while I still
had an issue with pinched optics (gibbous stars). No darks or flats were
taken or used.
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Image info:
12"LX200 on a Losmandy
Titan
Starlight Express
MX7C
20x4 mins
f/4
Stacked and processed in Astroart
guided with a Mintron 12V1
on a piggybacked 80mm Stellarvue AT1010