Launch from Cape Canaveral (KSC); landing on Cape Canaveral (KSC). Second Space Station Assembly Mission (ISS-02-2A.1).

Nearly 2 tons of equipment were brought to the ISS. Following a two day solo flight the Discovery docked to the ISS on 29.05.1999.

Jernigan and Barry performed an EVA on 30.05.1999 (7h 55m) to mount the Canadian built manipulator arm.

On May 31, 1999 the hatches between the Discovery and the ISS were opened. In the upcoming days the crew had to transfer 1.8 tons of equipment and water. This material was stowed in the Spacehab module in the payload pay of the Discovery.

Successful deploying of the STARSHINE satellite (Student-Tracked Atmospheric Research Satellite for Heuristic International Networking Experiment). The STARSHINE satellite consists of an inert, 19 inch (483 mm) hollow sphere covered by 1,000 evenly distributed, flat, polished mirrors, each 1 inch in diameter.