Hantramore III

Hantramore III was a hypothetical planet that was thought to exist around 5 billion years before humans discovered the Yentral system.

Pre-discovery
Scientists believe that Hantramore III existed between Hantramore Major and Yentral, and it was a small rocky asteroid-like planet, but it was somehow destroyed and formed Hantramore Major's rings.

Post-discovery
A simple sketch showing the theory was displayed in the Museum of Hantramore Minor.