"At about 7:30 p.m., Japan Aerospace Exploration Agency Astronaut Wakata will become a member of the station's Expedition 18 crew and Sandra Magnus will become a member of Discovery's crew. Magnus will have been a space station crew member for 121 days."
Editor's note: According to NASA PAO: "At 5:19:53: p.m. EDT, Space shuttle Discovery docked to the Pressurized Mating Adaptor on the front of the International Space Station's Harmony module. Docking occurred over Lake Wells, western Australia. Hatches between Discovery and the station will be opened at about 7 p.m., followed by the traditional welcoming ceremony."