Arcturian system

The Arcturian system was a star system around the star Arcturus, which had at least four planets. The Fourth Doctor visited one of these planets, AS4, which had two moons, and was home to palm-like plants and birds. AS4 was also the site of the wrecked command ship of a long-lost Cyberfleet, where the body of Cyber-leader Zogron was found. (COMIC: Junk-Yard Demon)