Guide Star Catalog

Guide Star Catalog

The Guide Star Catalog (GSC) is also known as the Hubble Space Telescope, Guide Catalog (HSTGC). It is a star catalogue built to support the Hubble Space Telescope with targeting off-axis stars. It contains approximately 20,000,000 celestial bodies with apparent magnitudes of 6 to 15.

As far as possible, binary stars and non-star objects have been excluded or flagged as not meeting the requirements of Fine Guidance Sensors.

When quoting a catalog entry, typically you write "GSC FFFFF-NNNNN", or alternately, "GSCfffff0nnnnn" (fffff0nnnnn). The F-sequence references a Hubble sky region code.

It is now in its second and much larger version, the Guide Star Catalog II.

ee also

* Hubble Guide Star Catalog - Astrographic Catalog/Tycho (GSC-ACT)
* Hubble Space Telescope
* Space Telescope Science Institute
* Star catalog

External links

* [http://www-gsss.stsci.edu/Catalogs/Catalogs.htm GSC I and GSC II home] and its [http://www-gsss.stsci.edu/zzzOldWebSite/gsc/GSChome.htm old web site]


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