This dialog asks for a coordinate pair in the form "1111,2222".

Alternatively, you can enter a sector number such as "123", to be brought to the center of that sector. A sector is a 100×100 area of space. The sector number is displayed in the lower-left corner of the starchart. Sector numbers appear on various paper starcharts and are a quick way to refer to an area. Unfortunately, they are generally not known to users of programs other than PCC/PCC2.

In case of a wrapped map, requesting a location outside the existing map area brings you to an alias of that location (i.e. 900,700 is outside the map, so you'll be brought to 2900,2700).

Reference

Keys:
G from starchart
This is a testing version.
It may be incomplete, and have more bugs (or features) than the public live version at planetscentral.com.