Myriagon

The Myriagon is a structure in the Triangulum Core Zone approximately 156 million years old. It is a relic of a civilisation of which little else has been discovered.

Structure
A ring formed of one thousand straight segments each 100km long, the Myriagon is located around a black hole of 1.8 solar masses. The ring's diameter is 31,800km and it masses approximately 3E25kg.

The object's function is unknown.