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Launch detail
SpaceX • Falcon 9 Block 5 • Space Launch Complex 4E (CA)
USSF-366 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of rocket stage drop zones being exact fits with previous Starlink Group 15 launches.
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On Saturday, August 15 at 6:50 p.m. PT, Falcon 9 launched the USSF-366 mission from Space Launch Complex 4E (SLC-4E) at Vandenberg Space Force Base in California.
This was the 18th flight for the first stage booster supporting this mission, which previously launched NROL-126, Transporter-12, SPHEREx, NROL-57, and 13 Starlink missions. Following stage separation, the first stage landed on the Of Course I Still Love You droneship, which was stationed in the Pacific Ocean.
There was the possibility that residents of Santa Barbara, San Luis Obispo, and Ventura counties may have heard one or more sonic booms during the launch, but what residents experienced depended on weather and other conditions.
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Free-to-share photography matched to this launch. Tap a photo to view it at full resolution.
Matched SpaceX launch-page assets and outbound media links for this launch.
Provider, rocket, pad, and booster history tied to this launch.
Core-level mission cadence associated with this launch.
USSF-366 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of rocket stage drop zones being exact fits with previous Starlink Group 15 launches.
Stream links and embedded coverage.
Official WebcastOfficial SpaceX post matched to this launch.
Open the launch pad in Google Maps satellite mode using the pad coordinates.
USSF-366 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of rocket stage drop zones being exact fits with previous Starlink Group 15 launches.
Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability.
All Times Approximate
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 Elon Musk with the goal of reducing space transportation costs and enabling the colonization of Mars. SpaceX operates from many pads, on the East Coast of the US they operate from SLC-40 at Cape Canaveral Space Force Station and historic LC-39A at Kennedy Space Center. They also operate from SLC-4E at Vandenberg Space Force Base, California, usually for polar launches. Another launch site is being developed at Boca Chica, Texas.
Linked via Spaceflight News API (SNAPI).
4f6ca132760bd83b1935621721bae1df5d9b6e31226e0117dec25b09b411b940A launch-area reference. Use your location for a viewpoint-specific result.
The sky is too bright at the launch site
A broad, sunlit jellyfish-style plume is not expected at the launch area under the current model. The rocket may still be visible as a point.
A planning call from the viewing model, not a percent chance or a guarantee.
If needed, your browser asks permission only after you choose this. The launch-area result is not a forecast for your viewpoint.
This call uses a modeled ascent corridor rather than an exact mission path. The overall call remains useful; direction and timing are approximate.
No broad, sunlit jellyfish plume is currently expected at the modeled viewpoint.
This outlook evaluates whether a broad, sunlit ascent plume could stand out. It does not yet predict whether a specific vehicle will produce one, and a no-jellyfish call does not mean the rocket itself will be invisible.
Launch-stage and landing context surfaced from LL2 when it exists.
The Falcon 9 first stage B1088 has landed on ASDS OCISLY after its 18th flight.
Temporary flight restrictions and NOTAM matches tied to this launch.
Advisory data is informational. Confirm operational constraints with official FAA publications.
