GO! - SpaceX - Falcon 9 - Starlink 17-21 - SLC-4E - Vandenberg SFB - Space Affairs Live

Launch Date: April 9, 2026 (PDT)
Launch Time: 7:39 p.m. PDT (April 10, 0239 UTC, 04:39 CEST)
Launch Window: Open 11:39 p.m. PDT
Launch Site: SLC-4E - Vandenberg Space Force Base, California
Targeted Orbit: Low Earth Orbit (LEO)
Launch Inclination: South
Launch Status: Scheduled and announced

Mission: Starlink Group 17-21
Launch Provider: SpaceX
Launcher System: Falcon 9 (Booster 1063 - Turnaround time 43 days)
Flight for the Booster: 32
Previous Flights of the Booster: 31 - Sentinel-6 Michael Freilich, DART, Transporter-7, Iridium OneWeb, SDA-0B, NROL-113, NROL-167, NROL-149, NAOS, and 22 Starlink missions
Droneship: Of Course I Still Love You (OCISLY)

Price: $69,75 million (without payload)
Diameter: 3,7 m
Height: 70 meters
Payload to Orbit: 22,800 LEO / 8,300 GTO
Lift-Off Thrust: 7,607 kilonewtons
Fairing: Diameter 5,2 meters / Height 13 meters
Stages: 2

SpaceX’s Falcon 9 is targeting the launch of 25 Starlink satellites to low-Earth orbit from Space Launch Complex 4 East (SLC-4E) from Vandenberg Space Force Base in California.

This will be the 32nd flight for the first stage booster supporting this mission, which previously launched Sentinel-6 Michael Freilich, DART, Transporter-7, Iridium OneWeb, SDA-0B, NROL-113, NROL-167, NROL-149, NAOS, and 22 Starlink missions. Following stage separation, the first stage will land on the Of Course I Still Love You droneship, which will be stationed in the Pacific Ocean.

Residents of Santa Barbara, San Luis Obispo, and Ventura counties may hear one or more sonic booms during the launch, but what they experience will depend on weather and other conditions.

You will find more information about the trajectory and data on the day of the launch here: https://flightclub.io/live

Countdown
Hr/Min/Sec Event
00:38:00 SpaceX Launch Director verifies go for propellant load
00:35:00 RP-1 (rocket grade kerosene) loading begins
00:35:00 1st stage LOX (liquid oxygen) loading begins
00:16:00 2nd stage LOX loading begins
00:07:00 Falcon 9 begins engine chill prior to launch
00:01:00 Command flight computer to begin final prelaunch checks
00:01:00 Propellant tank pressurization to flight pressure begins
00:00:45 SpaceX Launch Director verifies go for launch
00:00:03 Engine controller commands engine ignition sequence to start
00:00:00 Falcon 9 liftoff

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