60×120”; FSQ-85ED f/6.2 & ASI071MC, GT-40 240mm & ASI224MC; ZWO AM5 & ASIair+
Distance – 2’400 light-years: photons travelling since the 4th century BC when Greek civilization was at its height.
Emits (mag 7) in the wavelengths corresponding to oxygen, sulfur and hydrogen. It is a supernova remnant from 15’000 years ago that expands at a rate of 1.5 million km / hour.
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