Note: The Guide Star Catalog has been constructed to support the
operational need of the Hubble Space Telescope.
It contains over 25 million positions for about 19 million
objects, of which more than 15 million are classified as stars.
The version 1.2 is a new astrometric reduction which results in
absolute position errors about 0.3-0.4 arcsec.
(see GSC pages at URL http://www-gsss.stsci.edu/gsc/gsc.html)
Note: The current version includes only the North (POSS-I plates)
Note: Zone -40/+50deg
(original column names in green) (1692919135 rows)
(original column names in green) (1811709771 rows)
Note: SDSS is also available from http://www.sdss.org/
Note: SDSS is also available from http://www.sdss3.org/dr9/
Note: The recommended designation for the 7C sources is made from the full B1950 position with template 7C HHMMSS.s+DDMMSS
Note: The column FIRST provides a link to the FIRST cutout image server (see also the original FIRST search engine)