Hatches Close; Endeavour to Undock Sunday
"Mission Control, Houston has given the STS-118 crew a “go” for undocking Space Shuttle Endeavour from the International Space Station at 8 a.m. EDT Sunday. Mission managers made the decision as astronauts Dave Williams and Clay Anderson were wrapping up the fourth spacewalk of the mission.
Closing the hatches Saturday at 5:10 p.m. allows Endeavour to undock from the station Sunday in preparation for a possible landing on Tuesday. The earlier landing is being considered in the event Hurricane Dean threatens the Houston area. It would allow an opportunity for the shuttle to land before Mission Control would be shut down to prepare for a storm.
Managers will continue to review the forecast for Dean as they assess their options.
Image above: Hurricane Dean swirls in the Caribbean Sea as Space Shuttle Endeavour and the International Space Station pass overhead during STS-118's fourth spacewalk. Image: NASA TV
Williams and Anderson shortened their spacewalk to 5 hours, 2 minutes, to allow the early hatch closing and departure. They installed a stand for the shuttle’s robotic arm extension boom on the station’s truss structure, installed an External Wireless Instrumentation System antenna and retrieved two containers of the Materials ISS Experiment. They also had a chance to look down at the hurricane as it swirled in the Caribbean Sea.
The spacewalk began at 9:17 a.m. and concluded at 2:19 p.m., bumping up the total time for STS-118’s four spacewalks to 23 hours and 15 minutes. Saturday's excursion was the 92nd spacewalk devoted to station assembly."