Originally Posted by
JesusRocks1988
(Source)
Forgot to mention, for those who have been struggling to get a UP or need to know a decent way to get one.
I did manage to get a UP within minutes at Pleiades Sector KC-U B3-1 8. The method used was to repeatedly enter and leave the planet's sphere of influence (where the bottom left panel changes between the planet's name and "deep space"), and sitting for a few minutes inside it until a USS spawned.
I think this particular planet is so good for UPs because its SOI is so small, so the possible spawn area is smaller.
For example, HIP 20785's ammonia world has a massive SOI - about 65ls, but KC-U B3-1 8 has an SOI of only 3.5ls. So I'd recommend going for the smallest ammonia world you can find to try to search for UPs. As we know, entering and leaving the SOI resets the RNG of the USS spawns. You don't even have to do any orbits of the planet, you can simply throttle down in supercruise and sit there waiting for the USSs to come to you. Eventually you'll get that Degraded Emissions Threat 2.