The Snowden Station is a canon station that may be transported by JumpShip. Future errata will allow the Capitol Station as well.
The errata for this rule is:
SO p. 151 Special Enhancements
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"The exception to this is for Space Stations which are equipped to be carried by JumpShips. Such Space Stations are limited to 100,000 tons and must be equipped with a KF Boom. They replace the Space Station cost multiplier of x1.25 (see p. 158) with x20."
SO p. 66 Docking
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"Space Stations, equipped with KF Booms, take 1 hour to dock and to undock from a JumpShip for every 1,000 tons of mass (rounded up). They also occupy one Collar per 50,000 tons (rounded up). For example, the Snowden Mining Station, at 51,000 tons, takes 51 hours to dock with a JumpShip (51,000/1000= 51 hours) and two docking collars to be moved. In campaign play, round hours up to the nearest whole day (so the same Snowden would take three days to dock or undock). The JumpShip need only be present for the last half (round up) of the docking time or first half of the undocking time. During docking procedures a Space Station may not expend thrust, fire weapons or launch/ recover other units."
Exact wording of the final errata may be changed for clarity. However until such time as that is issued these rules are official.