Rockets
Upper stages, fairings, and boosters that never came down.
The boosters that stayed up
Most rockets come home now. Some don't — upper stages and fairings that reached orbit and never came down. We track them too, until they re-enter.
What we watch
upper stages spent, in graveyard orbits fairings jettisoned, short-lived boosters the reusable ones, when they fly again re-entry the final track, when it comes
The full life
A rocket is the only catalog object with a complete biography — pad, ascent, orbit, and often a landing. We keep the whole arc.