This is a loop around Colonia which hits systems that, in one or more stellar belt clusters, contain a concentration of 54% Palladium in Asteroid 2 as per the configuration of the B belt set out here: https://drive.google.com/open?id=0B178-EMIF8wtOEdYSS10Y2w0dk0

Asteroid 2 will feature 54.12% Palladium and nothing else. Asteroid 7 will often feature around 20% Palladium mixed with various other materials.

There are several clusters which have an abundance of Palladium but have been excluded due to large in-system travel required. One such system required pilots to travel over 100,000Ls. This route's systems will require an intra-system travel of, at most, ~2600Ls (but often much less).

See waypoint descriptions for the belt cluster which contains the Palladium.