Held In Stars
Sturja’s Vestigial Halo, often called Sturja X, is a region of the Star System beyond the planets, extending from the orbit of Sturja IX (at 28 AU) to approximately 56 AU from Sturja. It is similar to the asteroid belt, but it is far larger—280 times as wide and nearly 100,000 times as massive.
Like the asteroid belt, it consists mainly of small bodies, or remnants from the Star System’s formation.
Although many asteroids are composed primarily of rock and metal, most Vestigial Halo objects are composed largely of frozen volatiles (termed “ices”), such as methane, ammonia and water. The Vestigial Halo is home to three officially recognized dwarf planets: AC-141 5 , Nefertari 3 , and Keiko.
Nefertari 3 and the surrounding region make up a mining community know as Gavin’s Folly. Sturja X is ripe for mining. In recent cycles the number of explored Vestigial Halo Objects (VHOs) has grown to over a thousand but more than 3.14x 10^10 VHOs over 100 km (62mi) in diameter are believed to exist.
The Vestigial Halo is the main repository for periodic comets, those with orbits lasting less than 200 cycles. While most of the cloud is dynamically stable there is an active zone known as the Sturja Active Disk. Some active disk objects, such as Chania have extremely eccentric orbits that take them as far as 120 AU from Sturja.