This asteroid is Mysterious Asteroid 21341 and it's just like many other in this asteroid belt. The asteroids of the Anzat system are quite a sight for anyone to see. One could assume that these might be leftover galactic dust from the formation of this system, or they could have one of many other possible origins.
The asteroids in this belt surround the planets in this system like a veil of protection, making trips to and from the planets quite dangerous. But this also serves as a very useful defensive aid. People wishing to attack Anzat would have to bring fleets of ships across this belt of asteroids which would indeed be a perilous journey.
Historians only record one event when an asteroid crashed into a planet in this system. This created a major environmental problem on the planet for a period of time. This followed a near month-long blackout after the asteroid impacted on the surface.