About: Fine Guidance Sensor (HST)

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Fine Guidance Sensor (FGS) for the Hubble Space Telescope is a system of three instruments used for pointing the telescope in space, and also for astrometry and its related sciences. Each FGS uses a combination of optics and electronics to provide for pointing the telescope at a certain location in the sky. There are three Hubble FGS, and they have been upgraded over the lifetime of the telescope by manned Space Shuttle missions. The instruments can support pointing of 2 milli-arc seconds (units of degree). The three FGS are part of the Hubble Space Telescope's Pointing Control System, aka PCS. The FGS function in combination with the Hubble main computer and gyroscopes, with the FGS providing data to the computer as sensors which enables the HST to track astronomical targets.

Attributes	Values
rdfs:label	Fine Guidance Sensor (HST) (en)
rdfs:comment	Fine Guidance Sensor (FGS) for the Hubble Space Telescope is a system of three instruments used for pointing the telescope in space, and also for astrometry and its related sciences. Each FGS uses a combination of optics and electronics to provide for pointing the telescope at a certain location in the sky. There are three Hubble FGS, and they have been upgraded over the lifetime of the telescope by manned Space Shuttle missions. The instruments can support pointing of 2 milli-arc seconds (units of degree). The three FGS are part of the Hubble Space Telescope's Pointing Control System, aka PCS. The FGS function in combination with the Hubble main computer and gyroscopes, with the FGS providing data to the computer as sensors which enables the HST to track astronomical targets. (en)
foaf:depiction
dcterms:subject	Space astrometry missions Hubble Space Telescope instruments
Wikipage page ID	53370737 (xsd:integer)
Wikipage revision ID	1106041637 (xsd:integer)
Link from a Wikipage to another Wikipage	Binary star Degree (angle) Hubble Space Telescope 15 Eunomia STS-125 Gliese 876 Gliese 876 b Space astrometry missions Kuiper belt 43 Ariadne 44 Nysa 624 Hektor 63 Ausonia Earth Astrometry Asteroid Hubble Space Telescope instruments Kepler (spacecraft) Whipple (spacecraft) Space Shuttle Fine Guidance Sensor and Near Infrared Imager and Slitless Spectrograph Fine guidance sensor Guide Star Catalog Interferometer Gyroscope L722-22 Perkin-Elmer
Link from a Wikipage to an external page	http://hubblesite.org/the_telescope/nuts_.and._bolts/instruments/fgs/ http://iopscience.iop.org/article/10.1086/133033 http://www.stsci.edu/hst/fgs/documents/papers/spie.pdfThe https://www.nasa.gov/mission_pages/hubble/servicing/SM4/main/FGS_FS_HTML.html
sameAs	Fine Guidance Sensor (HST) Fine Guidance Sensor (HST) Fine Guidance Sensor (HST)
dbp:wikiPageUsesTemplate	dbt:Convert dbt:Reflist dbt:Short_description dbt:Hubble_Space_Telescope
thumbnail	wiki-commons:Special:FilePath/Hubble_OTA_FOVfgsyellow.png?width=300
has abstract	Fine Guidance Sensor (FGS) for the Hubble Space Telescope is a system of three instruments used for pointing the telescope in space, and also for astrometry and its related sciences. Each FGS uses a combination of optics and electronics to provide for pointing the telescope at a certain location in the sky. There are three Hubble FGS, and they have been upgraded over the lifetime of the telescope by manned Space Shuttle missions. The instruments can support pointing of 2 milli-arc seconds (units of degree). The three FGS are part of the Hubble Space Telescope's Pointing Control System, aka PCS. The FGS function in combination with the Hubble main computer and gyroscopes, with the FGS providing data to the computer as sensors which enables the HST to track astronomical targets. The FGS can be used to locate something in space, and then lock-on to it. It can provide the movements the telescope must make to keep the object in view, for the main instruments to record data on. The FGS were originally made by the optics company Perkin-Elmer, and as removable and repairable instruments it has been possible to refurbish them over the lifetime of the telescope. The first replacement FGS was installed in 1997, swapping out FGS1. In May 2009, on STS-125 a FGS was replaced during the mission to the Hubble telescope by the Space Shuttle. The astronaut crew performed an EVA (spacewalk) to service the FGS and other components on the telescope in Earth orbit. This was the SM4 mission. An example of astrometry science with the Hubble FGS system is observations of the Low-Mass Binary star system L722-22. Observations were taken of the system in 1990s, and the data helped determine the mass of each of the components of L722-22, which is also known as LHS 1047 and GJ 1005. The FGS are white-light shearing interferometers. The FGS weigh 220 kg (485 lb) and have dimensions of roughly 0.5 m × 1.0 m × 1.6 meters. (en)
prov:wasDerivedFrom	wikipedia-en:Fine_Guidance_Sensor_(HST)?oldid=1106041637&ns=0
page length (characters) of wiki page	9371 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Fine_Guidance_Sensor_(HST)
is Link from a Wikipage to another Wikipage of	FGS Interferometry 15 Eunomia STS-125 S Doradus GJ 1005 43 Ariadne 44 Nysa 624 Hektor 63 Ausonia Whipple (spacecraft) Pleiades Guide Star Catalog
is Wikipage disambiguates of	FGS
is foaf:primaryTopic of	wikipedia-en:Fine_Guidance_Sensor_(HST)

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