Nico wrote:
Perhaps they use Greek letters for the star within a constellation, and number outwards from the sun. Or there were lots of planets (and people) called Del, and at least one other Onus. And Gauda Prime could be the major planet of two that circle each other
Someone once told me 'Prime' would have to indicate the first planet, which is why GP could have never been named Darlon IV. However, if 'Prime' indicates the biggest planet in the system, then it could easily be fourth from the sun in the Darlon system. ie GP = Darlon IV in the same way Earth = Sol III.