The Starlink 15-10 mission added 27 broadband internet satellites into the low Earth orbit constellation. SpaceX accomplished liftoff from pad 4E at Vandenberg Space Force Base at 9:28 p.m. PST (12:28 a.m. EST / 0528 UTC).
This was the second out of two planned launches of these spacecraft using a Falcon 9 rocket. Liftoff from pad 40 at Cape Canaveral Space Force Station happened at 6:50 p.m. EDT (2250 UTC).