Live coverage: Kennedy Space Center to reopen Friday

This was the first of planned back-to-back Falcon 9 launches from Florida, less than four hours apart. Liftoff of the Starlink 6-89 mission happened at 10:08 p.m. EST (0308 UTC).

This is the launch timeline to be followed by the Atlas 5 rocket’s ascent into orbit from Cape Canaveral with the commercial Orbital ATK Cygnus cargo freighter headed to the International Space Station. Launch is scheduled for Tuesday at 11:11 a.m. EDT (1511 GMT).

Depending on how you count it, SpaceX launched its 100th kerosene-fueled Merlin 1D rocket engine on a Falcon 9 rocket Feb. 11, underscoring what it says is an accelerated flight regime for the centerpiece of the company’s propulsion shop.