NGC 604 is an H II region inside the Triangulum Galaxy. It was discovered by William Herschel on September 11, 1784.

Radius: 760 light years

Distance to Earth: 2.74 million light years

Absolute magnitude (V): -13.8

Apparent dimensions (V): 1′.93 x 1′.2 arcmins

Constellation: Triangulum

Apparent magnitude (V): 14

Did you know: This is one of the biggest known nebulae.