To get this you need to work with sublight.
There are three in the storyline but when you talk to Sublight at their office in The Groundbreaker, you'll have to complete the side quest "The Distress Signal" first in order to get the Navkey required to access the first pmanet they ask you to go to.
the order of Sublight quests is
The Space-Crime Continuum
The Ice Palace
The Chimerist's Last Experiment.
You can save The Doctor at the end of The final quest and still get the tropht as long as you followed the Sublights plan to the letter in the previous two. She still kicks you out her office though.