SpaceX Targets Monday Night USSF-627 Launch From Vandenberg

California's busy November launch cadence continues tonight. SpaceX is targeting Monday, November 9, for a Falcon 9 launch of the USSF-627 mission from Space Launch Complex 4E (SLC-4E) at Vandenberg Space Force Base in California, the company said in its mission briefing. The four-hour launch window opens at 7:03 p.m. PT (03:03 UTC on November 10) and runs to 11:03 p.m. PT.

USSF-627 is a classified mission for the U.S. Space Force. SpaceX and the Space Force have not disclosed the payload's details; launch trackers note that the mission's stage drop zones closely match those of previous Starlink Group 15 flights, which has fuelled speculation that the cargo is built on SpaceX's Starshield satellite bus — that identification is unconfirmed, and the official description remains a classified satellite deployment mission.

It would be the second Vandenberg launch of November, three days after Friday's USSF-432 liftoff from the same pad, and the next one is already queued behind it: USSF-317 is scheduled from SLC-4E later this week.

The window opens at 7:03 p.m. PT on Monday, November 9, and stays open for four hours, until 11:03 p.m. PT. If the mission does not fly tonight, SpaceX lists a backup opportunity on Tuesday, November 10, at 6:49 p.m. PT.

The mission had already shifted by a day — it was previously listed for Sunday, November 8 — which is routine at Vandenberg, where fog, upper-level winds and range scheduling move launch dates frequently. The time to beat is the opening of the window, not a single fixed instant: Falcon 9 can lift off at any point inside the four hours.

This will be the seventh flight for the first-stage booster supporting the mission, which previously launched NROL-179, SDA-T1TL-E, SDA-T1TL-A and three Starlink missions, according to SpaceX. Its most recent flight was about a month ago, a turnaround of roughly 31 days.

After stage separation, about two and a half minutes into flight, the booster will return to the droneship Of Course I Still Love You, stationed about 574 kilometres downrange in the Pacific Ocean. The published flight plan puts the booster landing at roughly eight minutes after liftoff.

SpaceX will carry a live webcast of the mission beginning about 10 minutes before liftoff, on its mission page and on X @SpaceX. Because USSF-627 is classified, coverage is limited by design: there will be no video from the second stage showing fairing deployment after stage separation.

For people near the coast, the launch is a night liftoff on a southeast trajectory — the profile that gives viewers in Southern California, and potentially Arizona, their best chance of seeing the rocket climb. SpaceX also advises that residents of Santa Barbara, San Luis Obispo and Ventura counties may hear one or more sonic booms during the launch, depending on weather and other conditions.

The same pad turns around again almost immediately. USSF-317, another classified Space Force mission, is listed for Thursday, November 12, with a window opening at 8:23 p.m. PT — a pad turnaround of about three days between the two missions, on top of the three days between USSF-432 and tonight's attempt.

Whatever USSF-627 carries will join the tracked orbital catalog once it is in orbit. WorldEye's satellite tracker follows catalogued objects on the live globe, alongside the space station tracker and the site's 74,229 cameras — the place to watch tonight's classified payload become tomorrow's tracked object.