Galaxy designation: the numbers following the first letter(s) in the location name signify the specific galaxy within that region an object belongs. The galaxy designation number may consist of any number of digits, though seven is the greatest number observed for any specific region of space. Examples: LK39 is an elliptical galaxy 12 million light yen-ars on the edge of the known universe first observed during the Great Migration. D425 is a medium sized spiral galaxy located only 846,000 light yen-ars from slightly larger D395 galaxy.
On D425E25 Tertius, D395 is known as the “M31” galaxy.
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Star system name: star systems are assigned an alphanumeric name based on their exact location within their galaxy. Depending on the galaxy and type of galaxy, star systems may have up to three letters and from two to six numbers in their names. For example, E25, and DLG4821