Definitions

astrographic

Hubble Guide Star Catalog - Astrographic Catalog/Tycho

The Hubble Guide Star Catalog - Astrographic Catalog/Tycho (GSC-ACT) is an astronomical catalogue. It contains the twenty million stars of the Hubble GSC, version 1.1, recalibrated using the U.S. Naval Observatory's ACT (Astrographic Catalog/Tycho). It is now considered obsolete, superseded by such catalogues as Tycho-2.

External links

Search another word or see astrographicon Dictionary | Thesaurus |Spanish
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature