Atlas 5/Cygnus post-launch news conference

An unpiloted space plane developed by Sierra Nevada Corp. will join cargo carriers built by SpaceX and Orbital ATK to resupply the International Space Station beginning in 2019, NASA announced Thursday.

Wrapping up a two-day chase since launching from Virginia’s Eastern Shore, a commercial Cygnus cargo craft arrived at the International Space Station Monday with more than 7,200 pounds of supplies and experiments, the second freighter to reach the orbiting complex in 15 hours.

A Northrop Grumman Cygnus supply ship packed with fresh food, experiments, and a new toilet for the International Space Station approached the orbiting research lab Monday, two-and-a-half days after launching from Virginia aboard an Antares rocket. Capture of Cygnus with the station’s robotic arm occurred at 5:32 a.m. EDT (0932 GMT).