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Rendezvous

The manoeuvring by which one spacecraft matches the orbit of another closely enough to operate alongside it.

Why it matters

Rendezvous is counter-intuitive in a way that matters operationally: to catch up with a target ahead of you, you slow down and drop to a lower, faster orbit, then rise to meet it. Every crewed station flight, every cargo delivery, every satellite-servicing and debris-removal mission depends on getting this right, and the approach is measured in hours of careful phasing rather than a straight-line chase.

In our data

Rendezvous is what makes several distinct mission types in our tracker possible at all - crew rotations, cargo resupply, and the servicing and debris-removal flights we follow. The crewed and cargo categories alone appear as separate mission classes in our launch data, distinct from ordinary satellite deployment.

Missions we track
Where we use it
Not to be confused with

Docking, which is the physical connection that may follow. A spacecraft can rendezvous and then hold station without ever touching its target - which is exactly what an inspection or debris-capture mission does first.