The shuttle Discovery, winding up its eighth flight since its maiden voyage Aug. 30, 1984, is scheduled to land Saturday in California, closing the first of seven manned American space shots planned for 1989.

Landing details at a glance:-Site: Edwards Air Force Base, Calif.

-Time: 7:35 a.m. MST (6:35 a.m. PST, 37 minutes after sunrise).

-De-orbit burn: 6:35 a.m. MST over Indian Ocean, longitude 172 west.

-Orbit: 79.

-Angle of attack: 40 degrees.

-Re-entry speed: 16,500 mph.

-Entry into discernable atmosphere: 7:04 a.m. MST.

-Radio blackout: Three to 15 minutes depending on performance of new space communications satellite over Pacific.

-Instrumentation: Automatic used until subsonic, then control stick.

-Landing speed: 213-226 mph.

-Preferred runway: 22, facing southwest at 220 degrees.

-Orbiter weight at landing: 194,460.

-Seating: Robert Springer, 46, alone on lower deck; on flight deck: commander Michael Coats, 43, veteran of Discovery's maiden flight; co-pilot John Blaha, 46, James Bagian, 37, James Buchli, 43.