(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 be a reference for a simultaneous
analogous project, the Cart du Ciel covering the sky to magnitude
14. The effort was carried on for decades, with more than twenty
observatories splitting the work. Eventually, the USNO
took up the effort, evolving into more modern efforts.
The plates produced have been of use for comparison with
recent efforts such as Hipparcos, for the study of
|AC||AC +79 3888||Astrographic Catalog|| |
|BAC||BAC 793||Astrographic Catalog||Bordeaux zone|