Guide Star Catalog
(GSC, HSTGC, Hubble Space Telescope Guide Catalog)
(catalog of stars to help aim HST)
The Guide Star Catalog (GSC
or Hubble Space Telescope Guide Catalog or HSTGC)
is a catalog of stars compiled to help with
the use of the Hubble Space Telescope, to provide the locations
of recognizable stars to be used when refining the
aim at objects near these stars in the celestial sphere.
To make it so-usable for accurate aiming,
it favors stars over other astronomical objects,
and favors non-binary stars.
GSC-I has 20 million stars of magnitudes
6 through 15, and GSC-II (aka GSC2) has nearly a billion
to magnitude 21.
The Guide Star Photometric Catalog (GSPC) is a catalog
including calibrated photometric of a smaller set
(fewer than 2000) of stars. Two major editions have been
produced, GSPC-I and GSPC-II.
|Prefix||Example||Survey/Catalog|| || |
|GSC||GSC 03549-02811||Guide Star Catalog|| || |
|GSPC||GSPC S840-F1||Guide Star Catalog||photometric catalog|| |
Referenced by pages:
Digitized Sky Survey (DSS)
position angle (PA)