Corrective Optics Space Telescope Axial Replacement (COSTAR)
E183138
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.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T1617646 — 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: Corrective Optics Space Telescope Axial Replacement (COSTAR) Context triple: [STS-61, payload, Corrective Optics Space Telescope Axial Replacement (COSTAR)]
-
A.
Faint Object Camera
The Faint Object Camera was a high-resolution imaging instrument on the Hubble Space Telescope designed to observe very dim and distant astronomical objects in ultraviolet and visible light.
-
B.
Space Telescope Imaging Spectrograph
The Space Telescope Imaging Spectrograph is a versatile instrument on the Hubble Space Telescope that performs high-resolution imaging and spectroscopy across ultraviolet, visible, and near-infrared wavelengths to study the physical properties of astronomical objects.
-
C.
Fine Guidance Sensor
The Fine Guidance Sensor is a high-precision pointing and stabilization instrument on the James Webb Space Telescope that locks onto guide stars to keep the observatory accurately aimed during observations.
-
D.
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.
-
E.
Mikulski Archive for Space Telescopes
The Mikulski Archive for Space Telescopes is NASA’s primary online repository for astronomical data from major space-based observatories, including Hubble and other missions.
- 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: Corrective Optics Space Telescope Axial Replacement (COSTAR) Target entity description: 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.
-
A.
Faint Object Camera
The Faint Object Camera was a high-resolution imaging instrument on the Hubble Space Telescope designed to observe very dim and distant astronomical objects in ultraviolet and visible light.
-
B.
Space Telescope Imaging Spectrograph
The Space Telescope Imaging Spectrograph is a versatile instrument on the Hubble Space Telescope that performs high-resolution imaging and spectroscopy across ultraviolet, visible, and near-infrared wavelengths to study the physical properties of astronomical objects.
-
C.
Fine Guidance Sensor
The Fine Guidance Sensor is a high-precision pointing and stabilization instrument on the James Webb Space Telescope that locks onto guide stars to keep the observatory accurately aimed during observations.
-
D.
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.
-
E.
Mikulski Archive for Space Telescopes
The Mikulski Archive for Space Telescopes is NASA’s primary online repository for astronomical data from major space-based observatories, including Hubble and other missions.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Hubble Space Telescope instrument
ⓘ
optical correction instrument ⓘ space telescope hardware ⓘ |
| abbreviation | COSTAR ⓘ |
| afterRemovalLocation |
National Air and Space Museum, Washington, D.C.
ⓘ
surface form:
Smithsonian National Air and Space Museum
|
| associatedEvent | Hubble Space Telescope optical flaw correction ⓘ |
| category |
Hubble Space Telescope component
ⓘ
space optics ⓘ space telescope instrumentation ⓘ |
| correctedInstrument |
Faint Object Camera
ⓘ
Faint Object Spectrograph ⓘ Goddard High Resolution Spectrograph ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designFeature |
deployable optical arms with small corrective mirrors
ⓘ
optics tailored to compensate Hubble primary mirror spherical aberration ⓘ |
| developedBy |
Ball Aerospace
ⓘ
Goddard Space Flight Center ⓘ
surface form:
NASA Goddard Space Flight Center
|
| exhibitedAt |
Steven F. Udvar-Hazy Center
ⓘ
surface form:
National Air and Space Museum Udvar-Hazy Center
|
| fullName |
Corrective Optics Space Telescope Axial Replacement (COSTAR)
self-linksurface differs
ⓘ
surface form:
Corrective Optics Space Telescope Axial Replacement
|
| function | insert corrective mirrors into the optical paths of Hubble instruments ⓘ |
| heritage | custom-designed for Hubble after discovery of mirror flaw in 1990 ⓘ |
| impact | restored diffraction-limited performance to corrected instruments ⓘ |
| installationDate | December 1993 ⓘ |
| installedByMission | STS-61 ⓘ |
| installedOn | Hubble Space Telescope ⓘ |
| launchedWithMission | STS-61 ⓘ |
| location | Hubble Space Telescope axial instrument bay ⓘ |
| mass | approximately 600 kilograms ⓘ |
| missionRole | interim optical correction until new corrected instruments were installed ⓘ |
| notable | first on-orbit optical correction system for a major space telescope ⓘ |
| operator | NASA ⓘ |
| orbit | low Earth orbit via Hubble Space Telescope ⓘ |
| partOf |
Corrective Optics Space Telescope Axial Replacement (COSTAR)
self-linksurface differs
ⓘ
surface form:
Hubble Space Telescope optical system
|
| powerRequirement | approximately 500 watts ⓘ |
| problemAddressed | Hubble primary mirror spherical aberration ⓘ |
| purpose |
correct spherical aberration of Hubble primary mirror
ⓘ
restore Hubble imaging performance to design specifications ⓘ |
| reliability | operated successfully for more than eight years in orbit ⓘ |
| removalDate | March 2002 ⓘ |
| removedByMission | STS-109 ⓘ |
| replacedBy | Advanced Camera for Surveys ⓘ |
| replacedInstrument | High Speed Photometer ⓘ |
| servicingMission |
Hubble Space Telescope servicing mission 1
ⓘ
surface form:
Hubble Servicing Mission 1
Hubble Space Telescope Servicing Mission 3B ⓘ
surface form:
Hubble Servicing Mission 3B
|
| spacecraft | Hubble Space Telescope ⓘ |
| status | retired ⓘ |
| technologyType | reflective optical system ⓘ |
| usedUntil | 2002 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Corrective Optics Space Telescope Axial Replacement (COSTAR) Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
Cosmic Origins Spectrograph
→
replacedInstrument
→
Corrective Optics Space Telescope Axial Replacement (COSTAR)
ⓘ
this entity surface form:
Corrective Optics Space Telescope Axial Replacement
Corrective Optics Space Telescope Axial Replacement (COSTAR)
→
fullName
→
Corrective Optics Space Telescope Axial Replacement (COSTAR)
self-linksurface differs
ⓘ
subject surface form:
COSTAR
this entity surface form:
Corrective Optics Space Telescope Axial Replacement
Corrective Optics Space Telescope Axial Replacement (COSTAR)
→
partOf
→
Corrective Optics Space Telescope Axial Replacement (COSTAR)
self-linksurface differs
ⓘ
subject surface form:
COSTAR
this entity surface form:
Hubble Space Telescope optical system
Hubble Space Telescope servicing mission 1
→
installedInstrument
→
Corrective Optics Space Telescope Axial Replacement (COSTAR)
ⓘ
this entity surface form:
Corrective Optics Space Telescope Axial Replacement
Hubble Space Telescope science instruments
→
include
→
Corrective Optics Space Telescope Axial Replacement (COSTAR)
ⓘ
this entity surface form:
Corrective Optics Space Telescope Axial Replacement