Asteroid Tessel

Asteroid Tessel was the subject of large-scale archaeological digs by the Federation in the 2260s.

In 2265, the USS Enterprise (NCC-1701) is summoned to the asteroid. Captain James T. Kirk leads a landing party, which includes Lieutenant Carolyn Palamas, to the asteroid to the discover that the archaeologists are being attacked by one million-year-old warrior robots. The landing party successfully defeats the robots, and the dig continues.

(TOS novel: ''Prime Directive).