SpaceX is set to retire its current fleet of Dragon capsules, in use since 2010, next year and begin flying supplies to the International Space Station on a new variant of the Dragon spacecraft based on the model in development to carry astronauts.

SpaceX’s Falcon Heavy rocket rolled out of its hangar and up the ramp to pad 39A at NASA’s Kennedy Space Center in Florida, then was raised vertical at the seaside launch complex early Monday in preparation for a late-night liftoff with two dozen weather observation and technology demonstration satellites.

The Starlink 6-63 mission falls on the fifth anniversary of Starlink v0.9, the first dedicated Starlink mission, on May 23, 2019. Liftoff Thursday is set for 10:45 p.m. EDT (0245 UTC).