Monday was a bonus day for scientific research aboard the Space Shuttle orbiter, Discovery. The threat of ground fog at Kennedy Space Center, Florida, forced a wave-off of the planned early-morning landing. The crew resumed on-orbit operations, which included reactivation of scientific instruments in the payload bay.

The International Extreme Ultraviolet Hitchiker-2 and Technology Applications and Science-1 payloads resumed operation throughout the flight day. The orbiter's systems continued to function flawlessly.

The Florida weather forecast for Tuesday is much the same as Monday. With an ample supply of consumables on board, Shuttle managers have opted to shoot only for a Florida landing Tuesday, and will not activate landing support systems in California. A single KSC landing opportunity Tuesday would put Discovery on the runway at 6:07 a.m. CDT, following a planned deorbit burn at 5:07 a.m. Morning fog remains a possibility.

Discovery's crew began its sleep shift at 2 p.m. CDT and will be awakened at 9:41 p.m. to begin its second series of preparations for deorbit and landing.

The next mission status report will be issued after landing. A post-landing news conference featuring Entry Flight Director Wayne Hale and Shuttle Program Manager Tommy Holloway is scheduled for 8 a.m. CDT Tuesday.

The STS-85 astronauts are scheduled to return to Houston and a ceremony at Ellington Field's Hanger 990 at approximately 4:45 p.m. Tuesday.

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