page_title: STS-120
section_title: 26 October (Flight day 4)
hierarchical_section_title: STS-120 / Mission timeline / 26 October (Flight day 4)
caption_attribution_description: The interior of the Harmony node was photographed after it was attached to its temporary location on the International Space Station during STS-120 flight day five activities.
context_page_description: STS-120 was a Space Shuttle mission to the International Space Station that launched on 23 October 2007 from the Kennedy Space Center, Florida. The mission is also referred to as ISS-10A by the ISS program. STS-120 delivered the Harmony module and reconfigured a portion of the station in preparation for future assembly missions. STS-120 was flown by Space Shuttle Discovery, and was the twenty-third Space Shuttle mission to the ISS.
context_section_description: The two crews started the day by preparing for the mission's first spacewalk, which began at 10:02 UTC, and ended at 16:16 UTC. Parazynski and Wheelock successfully completed all EVA activities, including preparing Harmony for removal from the payload bay. Wilson, Tani, and Anderson controlled the station's robotic arm, moving Harmony out of the bay and onto the port side of the Unity node. At 15:38 UTC, Harmony was officially mated to the space station. The station's new addition adds 2,666 cubic feet (75.5 m³) to the station's living volume, an increase of almost 20%, from 15,000 cubic feet (420 m³) to 17,666 cubic feet (500.2 m³).
  At the Mission Management Team meeting, managers cleared Discovery's heat shield for reentry, and verified that focused inspection was not required, but noted that late inspection will still be performed on flight day 13 following undocking. John Shannon mentioned that managers have decided to add a task to the second EVA, asking the astronauts to visually inspect the Solar Alpha Rotary Joint (SARJ) on the starboard side, as the joint has registered some vibration for the past month and a half. While the friction is not constant or severe, managers will have Tani remove the insulation covers from the joint to photograph the swing bolts on the joint since Tani would be near the area during the EVA.
caption: The interior of Harmony as seen following its attachment to the ISS on flight day 5.
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