It’s absolutely the Anoat system, it’s since shown up in lots of books and games.
Anyway, I always just assumed the Death Star had a hyperdrive and it never even occurred to me to question it. Very much the same sort of thing as that big debate over whether Luke was really choking the Gamorrean guards a few weeks ago. Though I think my idea of the Death Star’s hyperspace capabilities likely originates with the Decipher CCG, in which the Death Star was capable of hyperspace travel but had the lowest possible speed in the game.