Welcome to the c/SpaceX USSF-52 (OTV-7) Launch Discussion and Updates Thread, Take 2!

After a delay earlier this month to complete additional system checkouts, Falcon Heavy is back on the launch pad!

Scheduled for (UTC)	2023-12-29 01:07
Scheduled for (local)	2023-12-28 20:07 (EST)
Launch site	LC-39A, Kennedy Space Center, Florida.
Launch vehicle	Falcon Heavy
Center	1084-1 (expended)
Booster	1064-5 (RTLS)
Booster	1065-5 (RTLS)
Customer	United States Space Force
Payload	X-37B autonomous spaceplane
Mission success criteria	Successful deployment of X-37B into desired orbit

Livestreams

Stream	Link
Spaceflight Now	https://www.youtube.com/watch?v=wnfddhDuWDE
NASASpaceflight	https://www.youtube.com/watch?v=jqeM-CWz2Eo
The Launch Pad	https://www.youtube.com/watch?v=sa3R_EuzZzY
Space Affairs	https://www.youtube.com/watch?v=FG57KKnuHXg
Everyday Astronaut	https://www.youtube.com/watch?v=pYRSYOPBSYA
SpaceX	https://twitter.com/SpaceX/status/1740535676519821537#m
The Space Devs	https://www.youtube.com/watch?v=3iZrzJhUvRU

Stats

Sourced from NextSpaceflight and r/SpaceX:

☑️ 5th Falcon Heavy launch this year

☑️ 9th Falcon Heavy launch all time

☑️ 13th launch from LC-39A this year

☑️ 97th SpaceX launch this year

☑️ 310th SpaceX launch all time

☑️ 212th consecutive successful Falcon 9 / FH launch (excluding Amos-6) (if successful)

Payload info: X-37B

NextSpaceflight:

This mission will be carrying the US Space Force X-37B vehicle. Among the payloads is NASA’s Seeds-2 mission, which seeks to investigate the long-term effects of radiation on plant seeds.

ARS Technica:

In a statement, the Space Force said the seventh X-37B mission will have a “wide range of test and experimentation objectives.” The Pentagon wants everyone to know the X-37B spaceplane exists, but military officials are mum about the details of the vehicle’s missions. The Space Force’s statement Wednesday was similarly vague on details of the upcoming flight.

“These tests include operating the reusable spaceplane in new orbital regimes, experimenting with future space domain awareness technologies, and investigating the radiation effects on materials provided by NASA,” the Space Force said.

The X-37B program is a partnership between the Space Force and the Air Force Rapid Capabilities Office. Military officials have acknowledged there are two X-37B vehicles built by Boeing, and each has flown multiple times.

The spaceplane measures about 29 feet (8.9 meters) long with a wingspan just shy of 15 feet (4.5 meters), about one-quarter the size of one of NASA’s space shuttle orbiters. It has a cargo bay inside the fuselage for payloads, plus a disposable service module that was flown for the first time on the most recent X-37B mission, providing additional capacity for experiments.

The spaceplane fits snugly within the nose cone of a Falcon or Atlas rocket, allowing the X-37B to take off on top of a conventional launch vehicle just like any other satellite payload.

An Air Force spokesperson declined a request from Ars for additional information about the orbit for the next X-37B mission.

Launching the X-37B on a Falcon Heavy rocket will drive more speculation about the military spaceplane. US military officials have released information about some of the experiments the X-37B has flown, including electric thruster and advanced thermal control technologies. But past X-37B missions have deployed small satellites, both covertly and overtly, and the military has provided only vague descriptions of the spaceplane’s other activities.

Target orbit	undisclosed
Payloads	1
Total Mass	~5000 kg

Resources and articles:

• Official SpaceX mission page
• Next Spaceflight mission page
• ARS Technica (2023-11-08): In a surprise move, the military’s spaceplane will launch on Falcon Heavy (Stephen Clark)
• SpaceNews (2023-11-08): U.S. Air Force X-37B spaceplane to launch on a SpaceX Falcon Heavy rocket (Sandra Erwin)
• Spaceflight Now (2023-11-09): U.S. military’s X-37B mini-shuttle to launch on SpaceX Falcon Heavy for the first time (Will Robinson-Smith)
• Spaceflight Now (2023-12-13): Falcon Heavy launch of secretive X-37B military spaceplane on hold (Will Robinson-Smith)
• NASASpaceFlight (2023-12-28): Following scrub, Falcon Heavy to launch USSF-52 (Justin Davenport)
• Previous launch thread (Take 1), which was scrubbed.

Please post small launch updates, discussions, and questions here! Also feel free to leave feedback or suggestions for the mod team. We’re still a relatively small sub, so feedback from the community is very valuable!"