J. King was studying the universe maps and plotted out a simple projection of his own. He's created a representation of the Gemini Sector for use in plotting cargo runs. J. inquired about expanding this to more sectors, but no source coordinate reference is readily available. You can grab his Gemini SVG here (2 kb svgz). -- Original update published on July 8, 2011
I'm playing Privateer now, and I was disappointed to find out that there is no jump connecting Rikel and Eden as shown on our official universe map. The in-game map and Prophecy map both confirm this.
Whats the reason for the eden -> rikel jump point? You want to go back and check out the Retros again anyway! I actually never discovered that hidden jump point until my last playthrough. (I believe it's about my 7th or 8th complete playthrough!). I just backtracked the way I came... Am I missing some last little plot point or something? I know the game is over - the admiral tells me the credits.
Yeah, and it's a real long backtrack to go back to Perry to see Terrell. Eden->Rikel makes it just a couple short jumps.
Obviously you found Jones by paying attention to what the Retro on Eden told you. If I recall correctly, there should be a jump sphere around where you encounter Jones and his guard - that's the one that leads you to Rikel. It should show on the radar, if you're near enough.