Sleeper Data Sanctuary

Sleeper Data Sanctuary - Cosmic Anomaly
Class 2 Complex Site
NPCs - Hostiles

First Encounter
Sirius x3 (Platform)
Emergent Patroller x3 (Frigate Class)
Awakened Escorts x2 (Cruiser Class)

Killing the last Awakened Escort triggers the next spawn.

First Wave
Emergent Escort x4 (Frigate Class - )
Sleepless Escort x1 (Battleship Class)

Killing the Sleepless Escort triggers the next spawn.

Second Wave
Sleepless Escort x1 (Battleship Class)

(Source)