Delphi Ardu IV, classified as M-class, was the uninhabited fourth planet of the Delphi Ardu system. In the distant past, the planet was a part of the Tkon Empire.
Prior to stardate 41386, the Delphi Ardu system had only been charted by the Federation via long-range scans, that indicated no lifeforms, sentient or otherwise.
The planet was the ancient site of an outpost of the extinct Tkon, known as Outpost 63. (TNG: "The Last Outpost")