SpaceX launches third Starlink mission in less than two week

SpaceX launches third Starlink mission in less than two week

SpaceX launched the Starlink Group 4-27 mission aboard a Falcon 9 rocket.

Friday, August 19 at 3:21:20 PM EDT (19:21:20 UTC) from Cape Canaveral Space Force Station in Florida.

Cumulus cloud, surface electric field, and lightning rules gave launch weather a 50% chance.

A backup launch was available 24 hours later with a 70% likelihood of good weather.

Falcon 9 booster B1062 flew for the ninth time, the sixth in the fleet.

It was also the third-fastest booster turnaround, at 26 days, 5 hours, 43 minutes.

Falcon 9's 170th flight to orbit commenced with a T-35 minute countdown.

The ground computers begin loading RP-1 (a refined version of kerosene) on both stages and LOx on the first.

15 minutes after the second stage's RP-1 load, the T/strongback E's propellant lines were purged.

Falcon 9's first stage Merlin 1D engines began cooling around T-7 minutes.

At T-1 minute, ground computers pass off the countdown to onboard computers.

After separating from the second stage, the first stage orientated itself engines-first for landing.

10 seconds after the second stage engine ignited, the fairing parts split and splashed down in the Atlantic Ocean.

Once the satellites split, the second stage will deorbit over the Pacific Ocean.

Friday's launch was SpaceX's 56th Starlink mission, 37th of the year, and fourth this month.