'aucdet IX was the inhabited ninth planet of the 'aucdet system, and it was the site of a Federation Medical Collection Station.
In early 2365, the USS Enterprise-D arrived at the planet to take up specimens of plasma plague for transport to Science Station Tango Sierra. At that time, Lieutenant Commander Hester Dealt was the commanding officer of the station. (TNG: "The Child")
Appendices
Background information
A clear spelling
While this planets name was spelled as 'audet IX in the Star Trek Encyclopedia, it appeared as 'aucdet IX in both the episodes script [1] and on an on-screen display monitor in the episode.
According to the script for "The Child", the name of the planet was pronounced "O-det Nine."
The planet model first used here for 'aucdet IX would later be used for Gagarin IV in "Unnatural Selection", Galorndon Core in "The Enemy", Barzan II in "The Price", Jouret IV in "The Best of Both Worlds" and Bilana III in "New Ground". For its appearance as 'aucdet IX, the model had a blue color.