STS-109

STS-109
NASA or National Aeronautics and Space Administration · Public domain · source
Name	STS-109
Mission type	Hubble Space Telescope servicing mission
Operator	NASA
Mission duration	10 days, 22 hours, 11 minutes, 29 seconds
Launch date	March 1, 2002
Launch site	Kennedy Space Center Launch Complex 39A
Landing date	March 12, 2002
Vehicle	Space Shuttle Endeavour
Orbit	Low Earth orbit
Apsis	gee

STS-109

STS-109 was a NASA Space Shuttle mission flown by Space Shuttle Endeavour to perform the fourth servicing mission to the Hubble Space Telescope. The flight delivered and installed the Advanced Camera for Surveys, replaced the Power Control Unit and gyroscopes, and upgraded thermal control hardware to extend the observatory's operational life. The mission was a component of ongoing NASA efforts involving partners such as the European Space Agency and teams at the Goddard Space Flight Center.

Mission overview

The mission launched from Kennedy Space Center Launch Complex 39A aboard Space Shuttle Endeavour and was commanded to rendezvous with the Hubble Space Telescope in Low Earth orbit. Objectives included installation of the Advanced Camera for Surveys, replacement of the telescope's Fine Guidance Sensor components, replacement of the Power Control Unit and batteries, and refurbishment of the Space Telescope Imaging Spectrograph thermal blanket. The servicing required multiple extravehicular activitys staged from the shuttle's Payload Bay using the Canadarm robotic manipulator and was coordinated with engineers at the Jet Propulsion Laboratory and technicians at the Marshall Space Flight Center.

Crew

The seven-person crew combined veteran astronauts and mission specialists from NASA and represented collaborative operations with flight controllers at the Johnson Space Center and ground teams at the Goddard Space Flight Center. Key crew members included the mission commander and pilot, along with mission specialists responsible for extravehicular activity and robotic operations. Crew training drew on facilities at the Neutral Buoyancy Laboratory, coordination with the European Space Agency for instrumentation knowledge, and simulation centers at the Kennedy Space Center.

Payload and Hubble Space Telescope servicing

Primary payloads included the Advanced Camera for Surveys (delivered for installation to enhance imaging and survey capabilities), replacement parts for the Power Control Unit to restore electrical redundancy, and upgraded gyroscopes and batteries to improve attitude control and longevity. The mission also installed a new thermal blanket on the Space Telescope Imaging Spectrograph and carried a replacement Fine Guidance Sensor component. Operations interfaced with scientific teams at the Space Telescope Science Institute and instrument teams linked to the European Space Agency and the Ball Aerospace consortium. The payload deployment and retrieval made use of the shuttle's Canadarm and the crew conducted delicate handoffs during spacewalk operations coordinated with the Mission Control Center.

Flight timeline

After liftoff from Kennedy Space Center on March 1, the crew performed orbital rendezvous and berthing with the Hubble Space Telescope over subsequent orbits, executing a series of five planned extravehicular activitys to install and replace hardware. Each EVA required strict procedures established by the Johnson Space Center EVA Office and rehearsed in the Neutral Buoyancy Laboratory near the Johnson Space Center. The crew completed installation of the Advanced Camera for Surveys, swapped the Power Control Unit and batteries, and performed repairs and adjustments to the telescope's pointing devices. Following mission completion, the shuttle undocked from the telescope, conducted late inspection passes, and returned to a runway landing at Kennedy Space Center on March 12, concluding operations after nearly 11 days on orbit.

Mission patch and insignia

The mission insignia incorporated symbols referencing the Hubble Space Telescope, the shuttle vehicle, and the crew. Design elements reflected partnerships with the Space Telescope Science Institute, Goddard Space Flight Center, and international instrument collaborators such as the European Space Agency. Emblems and patches were produced under guidance from NASA insignia design protocols and worn during training and flight operations coordinated by the Johnson Space Center.

Legacy and impact

The mission significantly extended the science capabilities and operational life of the Hubble Space Telescope, enabling subsequent discoveries in cosmology, galaxy formation, and exoplanet characterization performed by teams at the Space Telescope Science Institute and research groups at institutions like the California Institute of Technology, Massachusetts Institute of Technology, and University of Chicago. The installation of the Advanced Camera for Surveys directly supported surveys that influenced work by astronomers affiliated with the Harvard–Smithsonian Center for Astrophysics, the Max Planck Society, and the European Southern Observatory. Technological and procedural lessons from the mission informed later servicing concepts, maintenance strategies for space observatories proposed by the National Academy of Sciences, and international collaboration frameworks involving the European Space Agency and other partners.

Category:Space Shuttle missions Category:Hubble Space Telescope servicing missions