STS-120 EVA Scott Parazynski.jpg
Parazynski performs a repair on a torn solar panel, using an improvised combination of the Orbiter Boom Sensor System and Canadarm2
Mission typeISS assembly
Mission duration15 days, 2 hours, 24 minutes.
Distance travelled10,060,000 kilometres (6,250,000 mi)[1]
Orbits completed238
Spacecraft properties
SpacecraftSpace Shuttle Discovery
Launch mass129,823 kilograms (286,211 lb)[2]
Landing mass91,578 kilograms (201,895 lb)[2]
Crew size7
MembersPamela A. Melroy
George D. Zamka
Douglas H. Wheelock
Stephanie Wilson
Scott E. Parazynski
Paolo A. Nespoli
LaunchingDaniel M. Tani
LandingClayton Anderson
Start of mission
Launch date23 October 2007, 15:38:19 (2007-10-23UTC15:38:19Z) UTC
Launch siteKennedy LC-39A
End of mission
Landing date7 November 2007, 18:01:18 (2007-11-07UTC18:01:19Z) UTC
Landing siteKennedy SLF Runway 33
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Perigee altitude340 kilometres (210 mi)[3]
Apogee altitude344 kilometres (214 mi)[3]
Inclination51.6 degrees[4]
Period91.6 minutes[4]
Docking with ISS
Docking portPMA-2
(Destiny forward)
Docking date25 October 2007 12:40 UTC
Undocking date5 November 2007 10:32 UTC
Time docked10 days, 21 hours, 52 minutes
Sts-120-patch.svgSTS-120 crew.jpg
(left to right) Parazynski, Wheelock, Wilson, Zamka, Melroy, Tani and Nespoli
← STS-118
STS-122 →

STS-120 was a Space Shuttle mission to the International Space Station (ISS) that launched on 23 October 2007 from the Kennedy Space Center, Florida.[5] 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.[2] STS-120 was flown by Space Shuttle Discovery, and was the twenty-third Space Shuttle mission to the ISS.


Position Launching Astronaut Landing Astronaut
Commander United States Pamela Melroy
Third and last spaceflight
Pilot United States George D. Zamka
First spaceflight
Mission Specialist 1 United States Douglas H. Wheelock
First spaceflight
Mission Specialist 2 United States Stephanie Wilson
Second spaceflight
Mission Specialist 3 United States Scott E. Parazynski
Fifth and last spaceflight
Mission Specialist 4 Italy Paolo A. Nespoli, ESA
First spaceflight
Mission Specialist 5 United States Daniel M. Tani
Expedition 16
Second and last spaceflight
ISS Flight Engineer
United States Clayton Anderson
Expedition 16
First spaceflight
ISS Flight Engineer

Crew notes

Two commanders: Melroy and Whitson place the STS-120 mission insignia on the wall of the newly installed Harmony module.

As commander of STS-120, Pamela Melroy became the second woman (after Eileen Collins) to command a Space Shuttle mission.[6] Additionally, the Expedition 16 crew that received STS-120 was commanded by Peggy Whitson, the first female ISS commander.[7][8] The flight of STS-120 thus became the first time two female mission commanders were in space at the same time.[9][10][11]

Crew prior to the Space Shuttle Columbia disaster

Prior to the Space Shuttle Columbia disaster, the original crew manifest for STS-120 was:

Position Astronaut
Commander James D. Halsell
Sixth spaceflight
Pilot Alan G. Poindexter
First spaceflight
Mission Specialist 1 Wendy Lawrence
Fourth spaceflight
Mission Specialist 2 Stephanie Wilson
First spaceflight
Mission Specialist 3 Piers Sellers
Second spaceflight
Mission Specialist 4 Michael Foreman
First spaceflight

The STS-120 mission patch was designed by Michael Foreman before he was reassigned to STS-123.

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