MISSION CONTROL CENTER STS-71 Status Report #15 Tuesday, July 4, 1995, 2 p.m. CDT With a graceful orbital bow, Atlantis departed the Mir space station on time this morning and is now flying solo once again while medical examinations of the Shuttle's new, homeward-bound passengers continue. Atlantis Commander Hoot Gibson undocked from Mir at 6:10 a.m. Central today, releasing hooks that held the docked spacecraft together and allowing springs built into the docking system to gently push the Shuttle away. Atlantis was preceded in undocking by a Soyuz spacecraft flown by Mir 19 Commander Anatoly Solovyev and Engineer Gennady Strekalov that unlatched from the station at 5:55 a.m. Central. As Atlantis slowly circled the station, the Soyuz redocked, each spacecraft capturing final photographs and film of the other. Aboard Atlantis, Gibson likened the session to a "cosmic ballet." Atlantis and her crew of eight are enroute to a Friday landing. The Mir 19 cosmonauts are embarking on a months-long stay aboard Mir. After firing Atlantis' jets for a final separation from the vicinity of Mir, medical investigations resumed in the Shuttle's laboratory module, with each of the three Mir 18 crew members taking turns exercising on a treadmill. The returning Mir 18 crewmen are on their 112th day of weightlessness, and such medical work will continue for the next two days aboard the Shuttle. Atlantis is currently about 35 nautical miles ahead of Mir, continuing to separate from the station by about 9 nautical miles with each orbit of Earth. The crew will go to sleep at 5:32 p.m. today and awaken for the ninth day of Atlantis' flight at 1:32 a.m. Wednesday. -end-