TBD

USSF-75

Name: USSF-75 launch
Start: 2026-12-31T00:00:00+00:00
End: 2026-12-31T00:00:00+00:00
Location: Launch Complex 39A, Kennedy Space Center, FL, USA

Falcon HeavySpaceXLaunch Complex 39A

Thursday, December 31, 2026 · 12:00 AM UTCAdd to Calendar

NextGo for Prop LoadT-35:00

Time to launch

T-

172

DAYS

HRS

MIN

SEC

Launch Window Confidence

46% — Uncertain

Vehicle

Falcon Heavy

Profile →

The Falcon Heavy is a variant of the Falcon 9 full thrust launch vehicle and consists of a standard Falcon 9 rocket core, with two additional boosters derived from the Falcon 9 first st...

Height70 m

LEO Payload63,800 kg

Launches832

Successes687

Provider

SpaceX

Profile →

USA • Founded 2002

Space Exploration Technologies Corp., known as SpaceX, is an American aerospace manufacturer and space transport services company headquartered in Hawthorne, California. It was founded in 2002 by entrepreneur E...

Mission Brief

Classified payload for the United States Space Force

PayloadUSSF-75

OrbitGeostationary Orbit

CustomerSpaceX

Stages3

PadLaunch Complex 39A, Kennedy Space Center, FL, USA

Mission Timeline

0 / 220%

Up next · Countdown

Go for Prop Load

Launch director gives the go to begin fueling

T-35:00

11:25 PM UTC

Go for Prop LoadT-35:0011:25 PM UTC
RP-1 Loading BeginsT-35:0011:25 PM UTC
Stage 1 LOX Loading BeginsT-35:0011:25 PM UTC
Stage 2 LOX Loading BeginsT-16:0011:44 PM UTC
Engine Chill BeginsT-07:0011:53 PM UTC
Flight Computer Final ChecksT-01:0011:59 PM UTC
Tanks Pressurize for FlightT-01:0011:59 PM UTC
Strongback Retract BeginsT-00:4511:59 PM UTC
Engine Ignition Sequence StartsT-00:0311:59 PM UTC

Ground vector

Launch site

Site locked

Launch Complex 39A

Kennedy Space Center, FL, USA

Global range

Latitude: 28.608°N
Longitude: 80.604°W

Range Weather

Launch commit criteria

Clear

Watch

TrackingNo active constraints

Weather Rules

Tracking no weather issues at this time.

Primary concern: No weather issues
Rule count: 0
Temperature: Not reported
Surface wind: Not reported

Window

12:00 AM UTC - 12:00 AM UTC

Schedule History

No delays or schedule changes recorded.

Upcoming Launches

Manifest / 02