Photos: Sun sets on Falcon 9 rocket at Cape Canaveral

The mission will be the sixth trip to the orbiting outpost for Ax-3 Commander Michael López-Alegría and the first for the other three crew members. Launch is planned for Wednesday, Jan. 17, at 5:11 p.m. EST (2211 UTC).

SpaceX is counting down to liftoff Saturday of a Falcon 9 rocket with a commercial cargo craft heading for the International Space Station after engineers replaced a component in an upper stage steering system that grounded the launcher Tuesday.

Rocket Lab’s first launch of the year lifted off Thursday at 7:27 p.m. EDT (2327 GMT) after a four-day delay to replace a video transmitter and wait for improved weather. The company’s Electron rocket launched from Mahia Peninsula on New Zealand’s North Island with a technology demonstration satellite for DARPA, the U.S. military research and development agency.