Rigel VI was the inhabited sixth planet in the Rigel star system. Lieutenant Robert Blackman, a crewmember aboard the USS Enterprise-D, was born on this non-Federation planet.

In 2369, this planet was listed on the chart "USS Enterprise Personnel Database", which was seen on Jean-Luc Picard's PADD on aboard the Enterprise-D. (TNG: "The Chase" okudagram)

This planet was only mentioned in writing.
According to Star Trek: The Next Generation Technical Manual and Star Trek: Deep Space Nine Technical Manual, Starbase 134 was located on Rigel VI. It was home to one of Starfleet's many ASDB Integration Facilities and was a major production base for building Miranda-class starships and Type 15 and Type 16 shuttlepods.