A huge Son'a vessel with unfolding sails, built to draw the rejuvenating metaphasic particles out of the rings of the Ba'ku planet, a process that would have left the world uninhabitable.
The collector appears in Star Trek: Insurrection. The Son'a and their Federation partners intend to move the six hundred Ba'ku off their world in secret and then use the collector to start a reaction in the planet's rings, concentrating the radiation that keeps the Ba'ku young.
When the relocation fails, Ru'afo decides to launch the collector with the Ba'ku still on the surface. Picard, Worf and Data trick the Son'a bridge crew by beaming them into a holographic copy of their own ship, halting the countdown. Ru'afo transports to the collector to restart it by hand and Picard follows. Picard sets the vessel to destroy itself and is beamed away by the Enterprise-E, while Ru'afo dies in the blast.