|Location:||Mira Antlia system|
|Affiliation:||United Federation of Planets|
Dytallix B was an uninhabited planet. It was the the fifth planet of the Mira Antlia system. The planet was tidally locked, with temperatures reaching 180 °C on the day side. This planet had no indigenous lifeforms.
Prior to stardate 41775, Dytallix B was mined for the Federation by the Dytallix Mining Company. This was one of seven uninhabited planets mined by this company. The mines were located in the temperate zones between the day and night hemispheres.
In 2364, the mines had been long abandoned and were used as a secret meeting place by Starfleet Captains Walker Keel, Rixx, Tryla Scott, and Jean-Luc Picard to discuss the infiltration of Starfleet Command by neural parasites. (TNG: "Conspiracy")