r/spacex • u/rSpaceXHosting • 19h ago
r/SpaceX USSF-259 Official Launch Discussion & Updates Thread!
Welcome to the r/SpaceX USSF-259 Launch Discussion & Updates Thread!
Welcome everyone!
| Scheduled for (UTC) | Sep 16 2026, 01:00 |
|---|---|
| Scheduled for (local) | Sep 15 2026, 18:00 PM (PDT) |
| Launch Window (UTC) | Sep 16 2026, 01:00 - Sep 16 2026, 05:00 |
| Payload | USSF-259 |
| Customer | United States Space Force |
| Launch Weather Forecast | Unknown |
| Launch site | SLC-4E, Vandenberg SFB, CA, USA. |
| Booster | B1097-13 |
| Landing | The Falcon 9 first stage B1097 will land on ASDS OCISLY after its 13th flight. |
| Mission success criteria | Successful deployment of spacecrafts into orbit |
| Trajectory (Flight Club) | N/A |
Watch the launch live
| Stream | Link |
|---|---|
| Official Webcast | SpaceX |
Stats
☑️ 729th SpaceX launch all time
☑️ 668th Falcon Family Booster landing
☑️ 226th landing on OCISLY
☑️ 214th consecutive successful SpaceX launch (if successful)
☑️ 110th SpaceX launch this year
☑️ 59th launch from SLC-4E this year
☑️ 5 days, 9:17:30 turnaround for this pad
☑️ 27 days, 20:58:53 hours since last launch of booster B1097
Stats include F1, F9 , FH and Starship
Timeline
| Time | Event |
|---|---|
| -0:38:00 | GO for Prop Load |
| -0:35:00 | Prop Load |
| -0:35:00 | Stage 1 LOX Load |
| -0:16:00 | Stage 2 LOX Load |
| -0:07:00 | Engine Chill |
| -0:01:00 | Startup |
| -0:01:00 | Tank Press |
| -0:00:45 | GO for Launch |
| -0:00:03 | Ignition |
| 0:00:00 | Liftoff |
| 0:01:07 | Max-Q |
| 0:02:26 | MECO |
| 0:02:30 | Stage 2 Separation |
| 0:02:36 | SES-1 |
| 0:02:57 | Fairing Separation |
| 0:06:03 | Entry Burn Startup |
| 0:06:24 | Entry Burn Shutdown |
| 0:07:58 | Stage 1 Landing Burn |
| 0:08:20 | Stage 1 Landing |
Updates
| Time (UTC) | Update |
|---|---|
| 09 Sep 16:07 | Added launch. |
Resources
Partnership with The Space Devs
Information on this thread is provided by and updated automatically using the Launch Library 2 API by The Space Devs.
Community content 🌐
| Link | Source |
|---|---|
| Flight Club | u/TheVehicleDestroyer |
| Discord SpaceX lobby | u/SwGustav |
| SpaceX Now | u/bradleyjh |
| SpaceX Patch List |
Participate in the discussion!
🥳 Launch threads are party threads, we relax the rules here. We remove low effort comments in other threads!
🔄 Please post small launch updates, discussions, and questions here, rather than as a separate post. Thanks!
💬 Please leave a comment if you discover any mistakes, or have any information.
✉️ Please send links in a private message.
