Caldwell 21, also known as NGC 4449, is an irregular, Magellanic-type galaxy in the constellation Canes Venatici, discovered by William Herschel in 1788. It lies roughly 12.5 million light-years from Earth and is undergoing a vigorous burst of star formation across its structure, giving it a patchy, knotted appearance in images.
Facts
Classification
Constellation CatalogueNew General Catalogue (NGC) 1 Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
2. Wikidata: Caldwell 21
Wikidata Q631918, class allow-list match (w-wdresolver-0926)View the Source NGC 4449 (Wikipedia)
Caldwell 21, Wikipedia - lead section, catalogue classification
NGC 4449, also known as Caldwell 21, is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away.
NGC 4449, Wikipedia - lead section, constellation
NGC 4449, also known as Caldwell 21, is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away.
- In Group: Irregular Galaxies, infobox 'type' field: IBm (NED classification, de Vaucouleurs system) filed under Irregular Galaxies
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