Astrographic Catalog
(AC, Astrographic Chart)
(historical star catalog of the whole sky to magnitude 11)
The Astrographic Catalog was to be the product of an effort begun
in 1887 to photograph the entire sky down to magnitude 11.5.
As conceived, it would provide a reference of brighter stars for a
simultaneous analogous project, the Cart du Ciel, which would
cover the sky to magnitude 14. The Astrographic Catalog effort was
carried on for decades, the sky divided into more than twenty zones,
assigned to individual observatories around the world. Eventually,
as efforts dwindled over time, the USNO took up the project
of completing it, which evolved into more modern efforts. The
plates produced by the earlier observatory efforts have been
of use for comparison with recent efforts such as Hipparcos, in the
study of proper motion
(survey,catalog,stars)
Further reading:
http://en.wikipedia.org/wiki/Carte_du_Ciel
https://collections.museumvictoria.com.au/articles/1649
https://www.usno.navy.mil/USNO/astrometry/information/catalog-info#ac
https://maas.museum/inside-the-collection/2017/08/02/the-astrographic-catalogue/
Prefix | Example | | |
AC | AC +79 3888 | | |
CFS | CFS 18398 | (or CF) Cape of Good Hope zone | |
GRW | GRW +70 8247 | Greenwich zone | |
|
Index