Mission details
| Launched | December 23, 2017 at 01:27 UTC |
|---|---|
| Status | Complete (Success) |
| Rocket | Falcon 9 Full Thrust |
| Launch pad | Space Launch Complex 4E, Vandenberg SFB, CA |
| Orbit | Low Earth Orbit |
| Mission type | Communications |
| Booster | B1036, 2nd flight (180 days since the last) |
| Landing | No landing attempt |
Times in UTC. Data from Launch Library 2 by The Space Devs, last changed 2026-10-26 21:39 UTC. Launch times move often; check the official page on launch day.
Replay and sources
More launches
- All SpaceX Falcon 9 launches
- SpaceX launches in 2017
- Launches from Space Launch Complex 4E, Vandenberg SFB, CA
- SpaceX launch schedule
- Falcon 9: size, height and specs
- SpaceX rocket size comparison
Latest Falcon dispatches
FAQ
Iridium-4 questions
When did Iridium-4 launch?
SpaceX launched Iridium-4 on a Falcon 9 from Space Launch Complex 4E, Vandenberg SFB, CA on December 23, 2017 at 01:27 UTC. Launch Library 2 records it as a success.
Which booster flew Iridium-4?
Booster B1036 flew for the 2nd time, 180 days after its previous flight, and was not recovered.
Where can I watch Iridium-4 again?
The official SpaceX webcast is linked on this page, under Replay and sources.
Answers as of October 26, 2026.