Hubble Guide Star Catalog – Astrographic Catalog/Tycho
id:
hubble-guide-star-catalog-astrographic-catalog-tycho-268-15089166
title:
Hubble Guide Star Catalog – Astrographic Catalog/Tycho
text:
The Hubble Guide Star Catalog – Astrographic Catalog/Tycho (GSC-ACT) is an astronomical catalog. It contains the twenty million stars of the Hubble GSC, version 1.1, recalibrated using the U.S. Naval Observatory's ACT. By 2009 it was considered obsolete, superseded by such catalogues as GSC-2.2, B1.0, A2.0, and especially UCAC-3. GSC-ACT was a re-calibration of the Guide Star Catalog version 1.1 for Hubble. The original GSC dated to 1989, and one of the reasons for an update was improvements to
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Hubble_Guide_Star_Catalog_%E2%80%93_Astrographic_Catalog/Tycho
date created:
date modified:
2022-02-23T07:43:00Z
main entity:
{"identifier":"Q5926972","url":"https://www.wikidata.org/entity/Q5926972"}
image:
fields total:
13
integrity:
13