Hubble Space Telescope Servicing Mission 3A

E257347

Hubble Space Telescope servicing mission Space Shuttle mission

Hubble Space Telescope Servicing Mission 3A was a 1999 Space Shuttle mission that repaired and upgraded the Hubble Space Telescope to restore its scientific capabilities.

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All labels observed (5)

Label	Occurrences
Hubble Space Telescope Servicing Mission 3A canonical	3
Servicing Mission 3A	3
Hubble Servicing Mission 3A	2
Hubble Space Telescope battery improvement kit	1
Hubble Space Telescope servicing mission STS-103	1

How this entity was disambiguated

This entity first appeared as the object of triple T2330480 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Hubble Space Telescope Servicing Mission 3A
Context triple: [STS-103, alsoKnownAs, Hubble Space Telescope Servicing Mission 3A]

A. Hubble Space Telescope Fine Guidance Sensors
The Hubble Space Telescope Fine Guidance Sensors are high-precision optical instruments that both keep Hubble accurately pointed at astronomical targets and serve as scientific tools for measuring stellar positions and distances.
B. STS-125
STS-125 was NASA’s final Space Shuttle servicing mission to upgrade and repair the Hubble Space Telescope, extending its scientific capabilities and operational life.
C. Hubble Space Telescope
The Hubble Space Telescope is a large, space-based observatory that has provided some of the most detailed images and data about the universe, revolutionizing modern astronomy and cosmology.
D. Corrective Optics Space Telescope Axial Replacement (COSTAR)
Corrective Optics Space Telescope Axial Replacement (COSTAR) was a set of corrective mirrors installed on the Hubble Space Telescope to compensate for its flawed primary mirror and restore its intended imaging performance.
E. STS-115
STS-115 was a 2006 NASA Space Shuttle Atlantis mission that resumed International Space Station construction by delivering and installing a major truss segment and associated hardware.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Hubble Space Telescope Servicing Mission 3A
Target entity description: Hubble Space Telescope Servicing Mission 3A was a 1999 Space Shuttle mission that repaired and upgraded the Hubble Space Telescope to restore its scientific capabilities.

A. Hubble Space Telescope Fine Guidance Sensors
The Hubble Space Telescope Fine Guidance Sensors are high-precision optical instruments that both keep Hubble accurately pointed at astronomical targets and serve as scientific tools for measuring stellar positions and distances.
B. STS-125
STS-125 was NASA’s final Space Shuttle servicing mission to upgrade and repair the Hubble Space Telescope, extending its scientific capabilities and operational life.
C. Hubble Space Telescope
The Hubble Space Telescope is a large, space-based observatory that has provided some of the most detailed images and data about the universe, revolutionizing modern astronomy and cosmology.
D. Corrective Optics Space Telescope Axial Replacement (COSTAR)
Corrective Optics Space Telescope Axial Replacement (COSTAR) was a set of corrective mirrors installed on the Hubble Space Telescope to compensate for its flawed primary mirror and restore its intended imaging performance.
E. STS-115
STS-115 was a 2006 NASA Space Shuttle Atlantis mission that resumed International Space Station construction by delivering and installing a major truss segment and associated hardware.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	Hubble Space Telescope servicing mission ⓘ Space Shuttle mission ⓘ
alsoKnownAs	STS-103 ⓘ
commander	Curtis L. Brown Jr. ⓘ
countryOfOperator	United States ⓘ linked to: United States of America
crewSize	7 ⓘ
EVAPerformed	yes ⓘ
followedBy	Hubble Space Telescope Servicing Mission 3B ⓘ STS-92 in Shuttle flight sequence context ⓘ linked to: STS-92
HSTServicingNumber	3A ⓘ
installedComponent	Hubble Space Telescope S-band single access transmitter ⓘ Hubble Space Telescope battery improvement kit ⓘ linked to: Hubble Space Telescope Servicing Mission 3A Hubble Space Telescope data recorder ⓘ linked to: Hubble Space Telescope data electronics Hubble Space Telescope voltage/temperature improvement kit ⓘ
landingDate	1999-12-27 ⓘ
launchDate	1999-12-19 ⓘ
launchSite	Kennedy Space Center ⓘ Kennedy Space Center Launch Complex 39B ⓘ
launchVehicle	Space Shuttle Discovery ⓘ
missionDuration	7 days 23 hours 11 minutes ⓘ about 8 days ⓘ
missionPatchFeature	Hubble Space Telescope imagery ⓘ
missionSpecialist	C. Michael Foale ⓘ linked to: Colin Michael Foale Claude Nicollier ⓘ Jean-François Clervoy ⓘ John M. Grunsfeld ⓘ Steven L. Smith ⓘ
notableFor	restoring Hubble to full scientific operation after gyroscope failures ⓘ
numberOfEVAs	3 ⓘ
objective	perform maintenance on Hubble Space Telescope systems ⓘ replace failed gyroscopes on Hubble Space Telescope ⓘ restore Hubble Space Telescope scientific capabilities ⓘ
operatedBy	NASA ⓘ
orbitingTarget	Hubble Space Telescope ⓘ
orbitRegime	Low Earth orbit ⓘ
pilot	Scott J. Kelly ⓘ
precededBy	STS-99 in Shuttle flight sequence context ⓘ linked to: STS-99
program	Hubble Space Telescope servicing program ⓘ linked to: Hubble Space Telescope servicing mission Space Shuttle program ⓘ linked to: NASA Space Shuttle program
purpose	repairing Hubble Space Telescope ⓘ servicing Hubble Space Telescope ⓘ upgrading Hubble Space Telescope ⓘ
replacedComponent	Hubble Space Telescope computer ⓘ Hubble Space Telescope fine guidance sensor ⓘ linked to: Hubble Space Telescope Fine Guidance Sensors Hubble Space Telescope gyroscopes ⓘ
spacecraft	Space Shuttle Discovery ⓘ
totalEVATime	about 24 hours ⓘ
year	1999 ⓘ

How these facts were elicited