This is a densely populated system under control of the Federation. It houses many mines and processing rigs of all kinds. In fact, Velorum is one of the most valuable systems of Federation, and because of this it's often attacked.
The Cartel has been targeting a large mining station and a water harvest base for many years, and the Aliens often appear in the border zones. The federation regularly sends mercenaries on missions in Velorum, but somehow they are not too eager to clean it up completely.