I've been flying system to system to system, etc. and cannot find Rendezvous 4 for the Emergence/Sand Worm expedition. Has anyone found it? How far did you have to fly?

I'm following the Expedition Route in the Galaxy Map, but it's going in 400ly hops and I can't seem to find it. My stops have all been First Contact points for quite a while.

Help!

EDIT: I warped back to a space station and then quickly found the Fourth Rendezvous. Somehow I had gotten close to the galactic core when the rendezvous was in the outer arms.