Messier 40

Messier 73

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Messier 73 (M73) is an asterism formed by four physically unrelated stars located in the southern constellation Aquarius. The asterism has an apparent magnitude of 9 and lies at an approximate distance of 2,500 light years from Earth. It has the designation NGC 6994 in the New General Catalogue.
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Messier 40: Winnecke 4

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Messier 40 (M40), also known as Winnecke 4 (WNC 4), is a double star located in the constellation Ursa Major, the Great Bear. M40 lies at a distance of 510 light years from Earth. It is one of the few Messier objects that are not deep sky objects, but were catalogued by mistake. It was not listed in the New General Catalogue (NGC).
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