Infobox Space mission
mission_name = STS-123
insignia = STS-123 patch.png shuttle = Endeavour
launch_pad = LC-39A
launch = start date|2008|03|11|6|28|14|Z (2:28:14 a.m. EDT)cite web|url=|title=Space Shuttle STS-123|author=NASA|year=2008|publisher=National Aeronautics and Space Administration|accessdate=2008-01-26]
landing = end date|2008|03|27|00|40|41|Z end date|2008|03|26|20|40|41|EDT [ [ NASA - Welcome to NASA's STS-124 Landing Blog ] ]
duration = 15 days, 18 hours, 12 minutes, 27 seconds
orbits = 250
altitude = 341 kilometers (184 nmi)
inclination = 51.6 degrees
distance = convert|6577800|mi|km
crew_photo = STS-123 crew portrait.jpg
crew_caption = Front row (L-R) Johnson, pilot; Gorie, commander. Back row (L-R) Linnehan, Behnken, Reisman, Foreman and Doi, mission specialists.
previous = STS-122
next = STS-124

STS-123 was a Space Shuttle mission to the International Space Station (ISS) which was flown by Space Shuttle "Endeavour". STS-123 was the 1J/A ISS assembly mission. The original launch target date was February 14, 2008 but after the delay of STS-122, the shuttle was launched on March 11, 2008. It was the twenty-fifth shuttle mission to visit the ISS, and delivered the first module of the Japanese laboratory, Japanese Experiment Module (Kibō), and the Canadian Special Purpose Dexterous Manipulator, (SPDM) "Dextre" robotics system to the station. The mission duration was 15 days and 18 hours, and it was the first mission to fully utilize the Station-to-Shuttle Power Transfer System (SSPTS), allowing space station power to augment the shuttle power systems. The mission set a record for a shuttle's longest stay at the ISS.cite web|title = Status Report: STS-123-01 | url=| date = 2008-03-11|publisher=NASA |accessdate=2008-03-26] The completion of the mission left nine flights remaining in the Space Shuttle program until its end in 2010, excluding two as-yet-unconfirmed Contingency Logistic Flights.


* Dominic Gorie (4) - Commander
* Gregory H. Johnson (1) - Pilot
* Robert L. Behnken (1) - Mission Specialist 1
* Michael Foreman (1) - Mission Specialist 2
* Richard M. Linnehan (4) - Mission Specialist 3
* Takao Doi (2) - Mission Specialist 4 - flag|Japan JAXA

Number in parentheses indicates number of spaceflights by each individual prior to and including this mission.

Launching ISS Expedition 16 Crew

*Garrett E. Reisman (1) - Flight Engineer

Landing ISS Expedition 16 Crew

* Léopold Eyharts (2) - Flight Engineer - flag|France ESA

Mission parameters

* Mass: TBD
* Perigee: 336 kilometers (181 nmi)
* Apogee: 346 kilometers (187 nmi)
* Inclination: 51.7 degrees
* Period: TBD

Mission payloads

STS-123 delivered the pressurized section of the Japanese Experiment Logistics Module (ELM-PS) as well as the SPDM to the International Space Station. The SPDM was delivered disassembled on a Spacelab Pallet (SLP) and assembled during three spacewalks once it was at the station.

Shuttle processing

In August 2007, STS-123 crew members participated in crew equipment interface tests for the ELM-PS at Kennedy Space Center. [cite web|author=JAXA|url = | title = Crew Equipment Interface Test (CEIT) for Kibo|year=2007|publisher=Japan Aerospace Exploration Agency] Processing continued on schedule for "Endeavour" 's launch in early 2008. NASA engineers applied the same ECO sensor modifications used on STS-122's external tank, to "Endeavour's" tank. In January, a HEPA filter contamination issue was discovered, but was resolved and with no impact to the mission.Cite web|url=|title=Endeavour rolls to VAB |accessyear=2008|accessmonthday=February 11|publisher=NASA|year=2008|author=Chris Bergin]

On Monday, February 11, 2008, "Endeavour" was "rolled over" to the Vehicle Assembly Building in preparation for mating with the external tank and solid rocket boosters. On Wednesday, February 13, "Endeavour" was successfully mated with its external tank and solid rocket boosters, and was rolled out to Launch Pad 39A in the early hours of Monday, February 18, for its planned launch on March 11.Cite web|url=|title=Endeavour Headed To Launch Pad Feb. 18|accessyear=2008|accessmonthday=February 13|publisher=Aviation Week|year=2008|author=Craig Covault] Cite web|url=|title=NASA's Space Shuttle Endeavour to Move to Launch Pad Monday|accessyear=2008|accessmonthday=February 13|publisher=NASA|year=2008|author=NASA] The Terminal Countdown Demonstration Test, a full dress rehearsal for launch with the crew, took place February 23-25.Cite web|url=|title=Space Shuttle Endeavour Arrives at Launch Pad, Countdown Test Set|accessyear=2008|accessmonthday=February 20|publisher=NASA|year=2008|author=Katherine Trinidad]

Mission background

The mission will mark:
*longest shuttle mission to the ISS to date
*153rd manned US space launch
*122nd space shuttle flight since STS-1
*97th post-"Challenger" mission
*9th post-"Columbia" mission
*30th Night Launch
*16th KSC Shuttle Night Landing, 22nd Shuttle Night Landing Overall
*21st launch of "Endeavour"
*2nd mission of "Endeavour" since Return to Flight [cite news| url= |publisher= CBS| date= 2008-02-24|accessdate=2008-03-11|title= Mission Quick-Look 1]

Mission timeline

Flight days are based on the days as experienced by the astronauts, who are generally in a day-and-night pattern that is not equal to that of the launch site. The first flight day is the day of launch for the astronauts. That day started at the launch site on March 10 (local time), with the actual launch in the early hours of the 11th and the astronauts going to bed several hours after launch. March 10 is called flight day 1 by NASA, even though the actual mission launched on March 11.

March 10 (Launch & flight day 1)

"Endeavour" launched on time at 2:28:14 a.m. EDT (06:28:14 UTC) early into the night of March 11th, from Launch Complex 39A at the Kennedy Space Center.

The Flash Evaporator System switched from its primary controller to the backup controller during launch, and instrumentation for a few left-side control thrusters was lost due to a card failure. These anomalies were not expected to affect the mission. [ [ Spaceflight Now | STS-123 Shuttle Report | Mission Status Center] ]

March 11 (Flight day 2)

The shuttle closed in on the space station. The crew used a 50 ft (15 m) laser-tipped boom to inspect its wings and nose for any sign of launch damage. The inspection has been standard procedure ever since the 2003 Columbia disaster. Flight director Mike Moses said a quick look at the images the astronauts beamed down to Earth revealed no signs of trouble.

In addition to performing the inspection, the astronauts also prepared their spacesuits for the five planned spacewalks and gathered the tools they would need for the docking. [ [ Endeavour set to dock at station] ]

March 12 (Flight day 3)

Endeavour's commander, Dominic Gorie, guided the shuttle through a 360-degree backflip, known as the rendezvous pitch maneuver, to allow for full photographic surveillance of the thermal tiles on the space shuttle's belly before docking with the space station. [ [ Endeavour's astronauts to begin spacewalk] ] Hatches between the two spacecraft were opened at 12:36 a.m. CDT. [cite web |url= |title=STS-123 Mission Control Center Status Report #05 |date=2008-03-13 |publisher=NASA] After docking the pallet carrying "Dextre" was moved to the Payload ORU Accommodation (POA) of the Mobile Base Station (MSB) by Canadarm.

March 13 (Flight day 4)

Spacewalkers Richard Linnehan and Garrett Reisman worked on installing Dextre. However, the Spacelab pallet carrying the SPDM would not power up. [cite web |url= |title=STS-123 Mission Control Center Status Report #06 |publisher=NASA |date=2008-03-13] Engineers on the ground tried a software patch, though later suspected a design flaw in Dextre's temporary power cable caused the issue. [ [ Space station's new robot on blink] ]

Crew members on board Endeavour used a robotic arm to remove the Japanese Logistics Module – Pressurized Section (JLP) from Endeavour's cargo bay and attach it to the space station. The JLP was attached to its interim location on the Harmony module at 3:06 a.m. CDT. [cite web |url= |title=STS-123 Mission Control Center Status Report #07 |publisher=NASA |date=2008-03-14]

March 14 (Flight day 5)

The crew spent time outfitting the Japanese Logistics Module, transferring supplies and equipment into it from space shuttle Endeavour. The station’s arm operators grappled the Canadian-built Dextre Friday at 9:59 p.m. EDT. Canadarm2 successfully powered up Dextre 11 minutes later. Mission Specialists Rick Linnehan and Mike Foreman spent the night in the station’s Quest Airlock in preparation for the second spacewalk of the mission. [ [ Astronauts Enter JLP, Prepare for Spacewalk] ]

March 15 (Flight day 6)

Dextre was put together today during the second spacewalk of STS-123. Mission Specialists Richard Linnehan and Mike Foreman completed their 7-hour, 8-minute orbital stroll Sunday at 2:57 a.m. EDT. The spacewalkers encountered some difficulty removing two bolts that secured the robot arm during transport, and had to resort to using a prybar to remove them.

Throughout the day, the station and shuttle crew members continued outfitting the Japanese Logistics Module - Pressurized Section. [ [ Crew Assembles Dextre During Second Spacewalk] ]

March 16 (Flight day 7)

The crews continued outfitting the Japanese Logistics Module - Pressurized Section, transferring supplies and equipment into it from Endeavour, as well as configuring racks inside the module. The crews tested the brakes in the robotic system’s arms. One of the joints in the arm seemed to be operating right on the required margin. Engineers expressed confidence that this issue would be resolved

Rick Linnehan and Robert Behnken ended their day by “camping out” in the station’s Quest Airlock. [ [ Astronauts Continue Outfitting JLP Today] ]

March 17 (Flight day 8)

Linnehan and Behnken began the third EVA at 6:51 p.m. EDT. The excursion lasted six hours and 53 minutes. Linnehan and Behnken installed a spare parts platform, cameras, and tool handling assembly for Dextre. Among other tasks, they also checked out and calibrated Dextre’s end effector and attached critical spare parts to an External Stowage Platform.

They were unable to attach a materials science experiment to the Columbus module due to issues with the attachment fitting, but may have another opportunity later in the mission. [ [ Astronauts outfit robot with tool belt, cameras] ]

March 18 (Flight day 9)

In a day highlighted by robotics activity, Dextre was attached to a power and data grapple fixture located on the U.S. laboratory Destiny. Canadarm2 grabbed the pallet that secured Dextre during its journey to the orbital outpost and returned the pallet to space shuttle Endeavour’s payload bay for the trip back to Earth.

The station and shuttle crews also prepared hardware to be used in a shuttle tile repair test on the next spacewalk, and got some much needed off duty time. [ [ Dextre Moved to Destiny Lab, Crew Enjoys Time Off] ]

March 19 (Flight day 10)

The crews of space shuttle Endeavour and the International Space Station got some off-duty time at the beginning of their 10th day in orbit. They also spoke to Japanese Prime Minister Yasuo Fukuda and participated in interviews with U.S. media.

The astronauts spent the remainder of their day configuring tools for the fourth STS-123 spacewalk and reviewing spacewalk procedures. Before going to sleep, Mission Specialists Robert L. Behnken and Mike Foreman entered the station’s Quest airlock for the standard “camp out". [ [ Astronauts Prepare for Fourth Spacewalk] ]

March 20 (Flight day 11)

Mission Specialists Robert L. Behnken and Mike Foreman completed the fourth STS-123 spacewalk at 12:28 a.m. EDT, spending six hours and 24 minutes on the excursion. The two shuttle crew members replaced a failed Remote Power Control Module – essentially a circuit breaker – on the station’s truss. However, there were difficulties removing a power connector from the Z1 truss.

With Mission Specialist Rick Linnehan coordinating their activities from inside the orbiting complex, the spacewalkers also tested a repair method for damaged heat resistant tiles on the space shuttle. This technique used a caulk-gun-like tool named the Tile Repair Ablator Dispenser to dispense a material called Shuttle Tile Ablator-54 into purposely damaged heat shield tiles. The sample tiles will be returned to Earth to undergo extensive testing on the ground. [ [ Endeavour Crew Tests Repair Method, Prepares for Inspection] ]

March 21 (Flight day 12)

The STS-123 crew performed the final inspection of space shuttle Endeavour’s heat shield using the shuttle’s robot arm and the Orbiter Boom Sensor System (OBSS). Gorie, Johnson, and Doi surveyed the orbiter’s wings and nose cap to ensure that no damage had occurred to the tiles that protect Endeavour from the heat of reentry.

The crews spent the remainder of their day configuring tools and reviewing procedures for the flight’s final spacewalk. This included the standard “camp out” in the station’s Quest airlock for Behnken and Foreman. [ [ Astronauts Prepare for Final STS-123 Spacewalk] ]

March 22 (Flight day 13)

Michael Foreman and Robert Behnken completed their six-hour EVA at 02:36 (UTC), attaching a 50 ft (15 m) inspection pole to the international space station and completing other chores. Foreman and Behnken hooked an extra-long power cord to the inspection pole, to keep its lasers and cameras warm for the next two months, then secured the boom to the outside of the space station.

After finishing that task, Foreman inspected a jammed rotating joint that has restricted the use of a set of solar wings for months. NASA hopes to have a plan for dealing with the jammed joint by the end of the month, space station flight director Dana Weigel said. [ [ Endeavour crew rests before trip home] ]

March 23 (Flight day 14)

The crews of space shuttle Endeavour and the International Space Station completed their last full day together.

Much of the astronauts’ morning was off‐duty time. Afterward, the crews wrapped up transfers of equipment and supplies between Endeavour and the station, and out the tools needed for undocking and subsequent activities.

The STS-123 and Expedition 16 crews also held a joint crew news conference, answering questions from members of the media on Earth. [ [ Crews End Last Full Day Together] ]

March 24 (Flight day 15)

The hatches between "Endeavour" and the International Space Station closed around 5:49 ET, ending a 12 day stay at the ISS, with a scheduled undocking of 7:57 ET. Because of problems with a command sent to solar arrays in the ISS, the undocking occurred at 8:25 ET.

March 25 (Flight day 16)

The crew of space shuttle Endeavour spent Tuesday getting ready for its journey home and the end of the STS-123 mission. Early in their day, the crew members performed a test of the thrusters that will be used to position the orbiter for re-entry and the control surfaces for its flight through the atmosphere.

The STS-123 astronauts also set up the recumbent seat for Mission Specialist Léopold Eyharts, who joined the crew of Endeavour on the International Space Station. The recumbent seat is a special seat designed to reduce the stress of gravity on those who have spent long periods of time in the weightless environment of space. [ [ STS-123 Continues Landing Preparations] ]

March 26 (Flight day 17, landing)

Flight controllers gave a no-go on de-orbit for the first landing opportunity at 23:05 UTC (19:05 EDT), due to unfavorable weather conditions at the Shuttle Landing Facility at Kennedy Space Center. [ [ NASA's STS-123 Landing Blog] ]

Weather conditions were acceptable for the second landing opportunity, planned for 00:39 UTC 27 March, 2008 (20:39 EDT 26 March, 2008). The landing occurred at the Shuttle Landing Facility, and was the sixteenth night landing of the Space Shuttle at KSC , 22nd Shuttle night landing overall. Coincidentally, this mission also began with a night launch.

The second landing opportunity was a complete success with main gear touchdown occurring at 20:39:08 EDT (00:39:08 UTC 27 March, 2008), nose gear touchdown at 20:39:17 EDT (00:39:17 UTC 27 March, 2008), and wheels stop at 20:40:41 EDT (00:40:41 UTC 27 March, 2008), completing the STS-123 crew's 15-day, 18-hour, 11-minutes, and 3-seconds space voyage.

The exhaust produced by the Hydrazine Gas Generator APUs on either side of Endeavour's tail fin created concern among some observers that something was amiss, as it appeared more pronounced than usual in NASA's visual light cameras. [ [ Spaceflight Now | STS-123 Shuttle Report | Shuttle Endeavour returns from space ] ] However this exhaust is normal and expected. The three Hydrazine Gas Generator APUs are activated 5 minutes before the deorbit burn and are running for 5 min. after wheels stop. The monopropellant hydrazine is changing phase due to a catalyst and reach 1,700°F (927°C). [ [ Hydrazine Gas Generator performance on Space Shuttle] ] The hydraulic power is needed for the shuttle's rudder/speed brake, elevons, body flap and landing gear during descent, and for the main engine nozzles' gimballing during ascent. Each of the Solid Rocket Boosters have two similar Hydrazine Gas Generators for their nozzle gimballing.

Extra-vehicular activity

Five spacewalks took place during the flight.cite news | first=Brandi | last=Dean | coauthors= | title=All Aboard for STS-123: The Station Goes Global | date= | publisher=Johnson Space Center | url = | work = | pages = | accessdate = 2008-02-14 | language = ] [cite web|url=|title=NASA Sets Briefings to Preview March Space Shuttle Mission, STS-123|publisher=NASA|accessdate=2008-02-16|date=2008-01-29] The total time of all spacewalks was 33 hours and 28 minutes.

Wake-up calls

A tradition for NASA human spaceflights since the days of Gemini, is that mission crews are played a special musical track at the start of each day in space. Each track is specially chosen, often by their family, and usually has a special meaning to an individual member of the crew, or is applicable to their daily activities. [cite news | first=Colin | last=Fries | coauthors= | title=Chronology of Wakeup Calls | date=2007-06-25 | publisher=NASA | url = | work = | pages = | accessdate = 2007-08-13] Cite web|url=|title=STS-123 Wakeup Calls|accessyear=2008|accessmonthday=March 11|publisher=NASA|year=2008|author=NASA]

* Day 2: "Linus and Lucy" performed by Vince Guaraldi, played for Mission Specialist Michael Foreman. [ WAV] [ MP3]
* Day 3: Soundtrack of the movie "Godzilla vs. SpaceGodzilla" and the song "Godzilla" (from the album Spectres) performed by Blue Öyster Cult, played for Mission Specialist Takao Doi. [ WAV] [ MP3]
* Day 4: "Saturday Night" performed by the Bay City Rollers, played for Flight Engineer Garrett Reisman. [ WAV] [ MP3]
* Day 5: "Turn! Turn! Turn! (To Everything There is a Season)" performed by The Byrds, played for Mission Specialist Richard M. Linnehan. [ WAV] [ MP3]
* Day 6: "We're Going to Be Friends" performed by The White Stripes, played for Mission Specialist Robert L. Behnken. [ WAV] [ MP3]
* Day 7: "God of Wonders" performed by Caedmon's Call, played for Commander Dominic Gorie. [ WAV] [ MP3]
* Day 8: "Sharing the World" performed by Gregory H. Johnson’s brother, played for Pilot Gregory H. Johnson. [ WAV] [ MP3]
* Day 9: "Hoshi Tsumugi no Uta" (星つむぎの歌 or "Song of Spinning Stars"), performed by Ayaka Hirahara, played for Mission Specialist Takao Doi. [ WAV] [ MP3]
* Day 10: "Burning Love" performed by Elvis Presley, played for Mission Specialist Michael Foreman. [ WAV] [ MP3]
* Day 11: "Blue Sky" performed by Big Head Todd and the Monsters, played for Mission Specialist Richard M. Linnehan. [ WAV] [ MP3]
* Day 12: "Enter Sandman" performed by Metallica, played for Mission Specialist Robert L. Behnken. [ WAV] [ MP3]
* Day 13: "I Loved Her First" performed by Heartland, played for Commander Dominic Gorie. [ WAV] [ MP3]
* Day 14: "I am Free" (Newsboys song) performed by the Praise Team at Michael Foreman's church, played for Mission Specialist Michael Foreman. [ WAV] [ MP3]
* Day 15: "Furusato" (folksong) performed by Yuko Doi, played for Mission Specialist Takao Doi. [ WAV] [ MP3]
* Day 16: "Con te partirò" performed by the Andrea Bocelli, played for Flight Engineer Léopold Eyharts. [ WAV] [ MP3]
* Day 17: "Drops of Jupiter" performed by the Train, played for Pilot Gregory H. Johnson. [ WAV] [ MP3]

Contingency mission

STS-324 was the designation given to the Contingency Shuttle Crew Support mission which would have been launched in the event Space Shuttle Endeavour became disabled during STS-123.cite news | first=Chris | last=Bergin | coauthors= | title=NASA sets new launch date targets through to STS-124 | date=2007-04-15 | publisher=NASASpaceflight | url = | work = | pages = | accessdate = 2007-08-21 | language = ] It would have been a modified version of the STS-124 mission and would have involved the launch date being brought forward. The crew for this mission would have been a four-person subset of the full STS-124 crew.


Space Shuttle "Endeavour" launches from launch pad 39A at Kennedy Space Center as part of the STS-123 mission]


External links

* [,com_seyret/Itemid,1/task,videodirectlink/id,536/ STS-123 Endeavour landing]
* [ NASA Assigns Crew for Japanese Lab and Canadian Robotics Mission]
* [ NASA Assigns Crew for Shuttle Mission to Install Japanese Lab] ,, March 22, 2007
* [ Up to the minute updates of STS-123 Mission]
* [ The STS-123 Official Flight Kit Manifest]

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