SpaceX will launch a Falcon 9 rocket from Kennedy Space Center at midnight on Monday to add another 21 satellites to its orbiting Starlink fleet.

The Starlink 12-2 mission’s launch from Pad 39A is scheduled for 12:35 a.m. EST (0535 UTC), just five days and seven hours since the last liftoff from the historic launch site, a new record throughput for SpaceX.

Spaceflight Now will broadcast the mission live starting an hour before launch. It will be SpaceX’s 131st orbital launch in 2024.

Meteorologists with the 45th Weather Squadron, based at Cape Canaveral Space Force Station, predicted a 60 percent chance of acceptable weather conditions for the launch. The biggest concern is rain showers that could violate the Eastern Range’s cumulus cloud rule. If necessary, there are multiple launch opportunities for the Starlink 12-2 mission until 3:21 a.m. EST (0821 UTC).

Of the 21 satellites, 13 are equipped for direct mobile phone connections. SpaceX’s US wireless partner, T-Mobile, recently announced it would launch a beta SMS service via the direct-to-cell Starlink satellites.

Starlink 12-2 is launched with Falcon 9’s 1080 first stage booster and completes its 14th flight. The booster entered service in May 2023 with the launch of the Axiom 2 commercial space station mission. It has already launched seven batches of Starlink satellites.

After stage separation, the launch vehicle will continue its flight range and land on the SpaceX drone ship Just Read the Instructions, stationed in the Atlantic Ocean east of the Bahamas.

The 21 Starlink satellites will be launched from the Falcon 9’s upper stage into a 293 by 284 kilometer orbit at an inclination of 43 degrees just over an hour after launch.