NGC 3888 is an intermediate spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . Additionally, six non-redshift measurements give a farther mean distance of . It was discovered by German-British astronomer William Herschel on 14 April 1789.
NGC 3888 is a starburst galaxy. It also has a nucleus which shines in the ultraviolet range, and is thus listed in Markarian's catalogue as Mrk 188.
NGC 3780 group NGC 3888 is a member of the NGC 3780 group (also known as LGG 247). This group contains 4 galaxies, including NGC 3780, , and .
Supernova One supernova has been observed in NGC 3888: SN 2015Q (TypeIb, mag. 16) was discovered by American amateur astronomer Patrick Higgins on 17 June 2015.
See also List of NGC objects (3001–4000)
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