Live coverage: Proton lifts off with U.S.-built satellite for Asian company

Preparations for the planned liftoff Thursday of a SpaceX Dragon capsule with a four-person crew to the International Space Station cleared another readiness review Tuesday at NASA’s Kennedy Space Center in Florida, but officials are tracking marginal wind and sea conditions in downrange abort zones in the Atlantic Ocean that could force a launch delay.

A Russian Soyuz booster rolled out of a hangar at the historic Baikonur Cosmodrome and rode a rail car to its launch pad Monday, setting up for Wednesday’s launch with a three-man crew hailing from Russia, Denmark and Kazakhstan.

Rocket Lab’s fifth flight of the year is set for liftoff as soon as Wednesday (U.S. time) carrying a small experimental satellite to orbit for Astro Digital, a Silicon Valley company aiming to demonstrate technologies in space after an earlier focus on Earth observation.