(covers information from several alternate timelines)
The Rigelian scout ship was a heavily-armed starship used under the authority of the Rigelian Trade Commission during the mid-22nd century. As scouts, these starships had small crew compliments of around seventeen.
In late-2154, a Rigelian scout ship was attacked by what appeared to be the United Earth starship Enterprise. The scout ship was able to inflict moderate damage on its attacker, and transmit a distress call, before being destroyed.
Following the incident, the Rigelian Trade Commission recognized the attacking vessel, and demanded compensation from Starfleet and the arrest of Jonathan Archer, the Enterprise's commander, for the loss of their vessel.