AS4 was a small rocky planet near Quadrant 747 and Quadrant 746 in the Arcturian system. It orbited the star Arcturus, had two moons, and was home to palm-like plants and birds.

AS4 was 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)