# Is there anything that lets me quickly figure out the distance from a safe jump point to the starport?

I realised something.

While reading the core rulebook I always assumed that the relevant distance for jumping into a system was the diameter of the systems star times one hundred, and I got the impression that it would take a few days to get from safe jump distance to the spaceport. However, while I was doing some calculations based on @paul-gilfedder great answer to this question I realised that Earth is orbiting outside of our stars diameter times one hundred.

I had been assuming that if Earth had a spaceport it would take 68h with a G1 drive to get from the spaceport to a safe jump distance, and that that was pretty standard for any solar system. However, if I understand this correctly it should take only 6h 20min to get from the jump point to Earths potential starport since it is only 1.276.000 km and not 140.000.000 that I assumed.

After this longwinded intro I get to my question: When the source material talks about a system and it’s main planet/starport is there any information included that lets me know what the travel time from safe jump distance to the spaceport is, or a way to infer it from the UPW? Makes a huge difference if the planets orbit is inside our outside of the stars 100D. For instance safe jump distance to Venus would be 32.000.000 km, which is 25 times that of Earth, because of this.