SpaceX test-fired a Falcon 9 rocket Friday in preparation for launch from NASA’s Kennedy Space Center in Florida carrying 60 more Starlink satellites into orbit.

The journey to the binary asteroid system, Didymos and its moon, Dimorphos, will take place over a roughly two-year period. The launch window lasts from October 7-27.

A SpaceX Dragon cargo freighter departed the International Space Station Tuesday for return to Earth, wrapping up the 20th and final visit to the orbiting research complex for the current version of SpaceX’s supply ship before an upgraded Dragon starts launching later this year. Release from the space station’s robotic arm occurred at 9:06 a.m. EDT (1306 GMT), followed by splashdown in the Pacific Ocean at 2:50 p.m. EDT (1850 GMT).