The (canon) Star Wars factbook Star Wars Made Easy: A Beginner's Guide to a Galaxy Far, Far Away identifies the object as a protostar, not a galaxy.
Interestingly this conflicts with previous sources (such as the Star Wars: The Empire Strikes Back - Radio Dramatization indicating that the rendezvous point was on the very edge of the outer rim, looking back into the Star Wars Galaxy.
Threepio: May I ask what is the latest word on the rallying of our forces?
Leia: It's better than we thought at first, Threepio. Just about everyone who got off Hoth made it here. So, we've got some supplies, a bit of fighter cover. Our losses in ships and lives weren't as bad as they might've been. Most of the Starfleet was busy chasing the Falcon.
Lando: So you're not just gonna sit out here on the rim of the galaxy much longer, hmm?