The laws of physics prevent superluminal speed travel, so I would say that the sleeper ships were traveling at about 1/2 the speed of light, making the travel time about 20 years. It was already the 23rd century in Sol, so I would say the year was 2200 C.E., when the 23rd century first started and about 197 years after Freelancer came out. Now it's the year 816 A.S., so 2003+197+20+816=3036. Freelancer would take place in the year 3036 C.E., or 1,033 years after 2003 C.E.
I personally believe that the Sigma-19 System is the Sirius System and that no one ever had any desire to make a jump gate to Sol, as they believe it is controlled by the Coalition while in reality it was destroyed.
EDIT: Re-worded to fix my math.
Carlos Rivera: Corsair Brotherhood Pirate - Retired, shifted to Tripoli Shipyard's Research and Development engineering teams Anthony Cameron: Guild Core Bounty Hunter - Killed in Action, committed suicide after being trapped in Omicron Minor following its destruction Juan Ruiz: Outcast Ghost of Razgriz Pirate - Killed in Action, killed by the Sirius Coalition Revolutionary Army during Bretonian piracy raid Michael Winchester: Liberty Security Force Agent - Missing in Action, likely killed during Rheinland espionage mission or trapped in Rheinland Space Eric McCormick: Order Pilot - Retired, shifted to planetside training of new recruits