Guide Star Catalog
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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.
[edit] See also
- Hubble Guide Star Catalog - Astrographic Catalog/Tycho (GSC-ACT)
- Hubble Space Telescope
- Space Telescope Science Institute
- Star catalog
[edit] External links
- GSC II home and its old web site
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