Extreme object
V404 Cygni
V404 Cygni is a black hole 7 800 light-years away, weighing 9.00 Suns.
A black hole that flares: in 2015 it lit up brighter than anything else in the X-ray sky for two weeks, then went quiet again.
See it live
It is on the live 3D map, where it really is.
Key facts
- Kind
- Black hole
- Distance
- 7 800 light-years
- Mass
- 9.00 Suns
See it from here
Too faint for the eye; a telescope, or a long photograph, shows it.
How the map draws it
Drawn as a ring at its measured distance; a black hole has no shape to draw and a pulsar is far too small — the kind of thing, not this exact one.