The closest quasar is 600 million light years away, and it is located
in the Cygnus A (3C405) galaxy.
A page on the Arizona State University web site displays a radio image
of the quasar, along with the following caption that identifies the
quasar using the name of the galaxy in which it resides:
"This is a radio image of Cygnus A (3C405) the closest quasar found.
Its closeness brings into question the currently held theory that all
quasars are very distant and old objects."
Arizona State University - Noble Science and Engineering Library -
While researching this question, I found several web sites that state
that quasar 3C273 is the closest quasar. But that quasar is over 1.5
billion light years away, so it cannot be the closest quasar.
A news release on the NASA web site tells us that the quasar in the
Cygnus A (3C405) galaxy is 600 million light years away:
"Astronomers using NASA's Hubble Space Telescope have found a new
quasar -- not billions of light years away like its known cousins, but
mere 600 million light years, the equivalent of Earth's cosmic
"The discovery in galaxy Cygnus A will give astronomers their first
opportunity for detailed study of a quasar [...]"
Hubble Uncovers a Hidden Quasar in a Nearby Galaxy (September 21,
I hope this helps.
(closest OR nearest) quasar
"closest quasar" OR "nearest quasar"
quasar "cygnus a" site:nasa.gov
galaxy "cygnus a" 3c405