Deneb 4 (Also written "Deneb IV") is a fictional outpost/colony in the Babylon 5 science fiction television series. It is the fourth planet out from the star Deneb, which is located 1600 Light Years from Earth.

It has been mentioned only sporadically in the course of the series, and hence not much information about it is available:

  • In "Parliament of Dreams," Catharine Sakai mentions traveling through the Deneb system recently.
  • In "Racing Mars," it is commented that Deneb IV is a large settlement and "The Largest Colony Market in the area"[1]

Scientific ConcernsEdit

Deneb is an amazingly bright star, and if a habitable planet did in fact orbit it, it would need to do so at a distance of about 2.5 AUs, midway between the orbits of Mars and Jupiter in our own solar system. Any closer and liquid water would not be able to exist.[2]


  1. [1]
  2. [2]

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