Messier 40, also known as Winnecke 4, is an optical double star in the constellation Ursa Major, made up of two stars that appear close together as seen from Earth but are not physically related to one another. It is the fortieth entry in Charles Messier's catalogue of nebulous and cluster-like objects.
Facts
Classification
Constellation Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikidata: Messier 40
- Wikidata Q13886, class allow-list match (w-wdresolver-0926)
- wikidata-q13886 Wikidata claim (w-bbfill-edspace5-0927)
View the Source2. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
Winnecke 4 (Wikipedia)
Messier 40, Wikipedia - lead section, catalogue classificationQuote, Messier 40, Wikipedia - lead section, catalogue classification
Winnecke 4 (also known as Messier 40 or WNC 4) is an optical double star consisting of two unrelated stars in a northerly zone of the sky, Ursa Major.
Messier 40 (Wikipedia)
In Group: Binary and Double Star Systems, Lead sentenceQuote, In Group: Binary and Double Star Systems, Lead sentence
Winnecke 4 (also known as Messier 40 or WNC 4) is an optical double star consisting of two unrelated stars in a northerly zone of the sky, Ursa Major.
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