Space shuttle Discovery approaches the ISS to dock (Live Video)

The space shuttle Discovery is moving closer to the International Space Station (ISS) for a 220-mile-high linkup.

The shuttle and its seven member crew are due to arrive at 5:12:46 P.M. (Eastern Daylight Time).

According to NASA, the shuttle was 1,310 miles (2,100 kilometers) out as of 11:54 A.M. and was gaining on the ISS by about 600 miles (965 kilometers) with every 90-minute orbit.

After its first launch attempt was postponed due to a hydrogen leak, Discovery and its astronauts lift off at the Kennedy Space Center in Florida Sunday (March 15).

Its mission is to deliver the final piece of the ISS power system. The crew includes Koichi Wakata, a Japanese astronaut who will become that nation’s first resident crew member. He will replace NASA’s Sandy Magnus on the station.

Watch Live: Space shuttle Discovery approaches the ISS to dock