Guide Star Catalog

From Free net encyclopedia

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.

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

See also

• Hubble Space Telescope
• Space Telescope Science Institute
• star catalog

External links

• GSC II homeTemplate:Astro-stub