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CRS-18 Dragon berthing

Following launch and a roughly two-day rendezvous, SpaceX’s CRS-18 Dragon capsule is expected to arrive at the International Space Station to begin an approximately one-month stay attached to the Earth-facing port of the Harmony module.

It is set to deliver the space station’s second international docking adapter, which is called IDA-3. IDA-2 was installed in July 2016 while IDA-3 was lost in June 2015 during the launch failure of CRS-17. Both docking adapters are meant to support commercial crew program spacecraft: SpaceX’s Crew Dragon and Boeing’s CST-100 Starliner.

Earlier Event: July 21
CRS-18 Dragon launch
Later Event: July 23
NG-11 Cygnus unberthing