Cygnus A is a radio galaxy, and one of the strongest radio sources in the sky. It was discovered by Grote Reber in 1939. In 1951, Cygnus A, along with Cassiopeia A, and Puppis A were the first "radio stars" identified with an optical source.
Distance to Earth: 600 million light years
Apparent mass: ~100,000 billion M☉
Magnitude: 16.22
Constellation: Cygnus
Apparent size (V): 0.549' × 0.457'
Redshift: 0.056075 ± 0.000067