Messier 91

Messier 91 (also known as NGC 4548 ) is a 10.1 like bright barred spiral galaxy with a surface area of 5.4 '× 4.3 ' in the constellation Coma Berenices.

Messier 91 was discovered on 8 April 1784 by the German - British astronomer William Herschel. The assignment of NGC 4548 Object number 91 from the Messier catalog has long been controversial since Messier the coordinates incorrectly relative stated in his notes to Messier 58, but probably said Messier 89.