/ftp/cats/I/225



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I/225   ==OBSOLETE version of Catalogue==
11-Nov-1998: See AC2000, I/247
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Query from: http://vizier.cds.unistra.fr/cgi-bin/VizieR?-source=I/225
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 216 Jan 18 2023 [TAR file] -rw-r--r-- 1 cats archive 371 Dec 19 2022 .message -rw-r--r-- 1 cats archive 31 Nov 11 1998 =obsolete= -r--r--r-- 1 cats archive 6015 Feb 24 1998 ReadMe -r--r--r-- 1 cats archive 4222 Jul 22 1996 notes.gz [Uncompressed] -r--r--r-- 1 cats archive 2055533 Mar 5 1996 oxf2ac.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/225 Oxford 2 AC Zone Data Reduced to ACRS (Urban+ 1996) ================================================================================ Oxford 2 AC Zone Data Reduced to ACRS Urban S.E., Martin J.C., Corbin T.E. <U.S. Naval Obs., unpublished (1996)> ================================================================================ ADC_Keywords: Astrographic zones ; Historical catalog ; Photographic catalog ; Positional data ; Regional catalog ; Surveys ; Cross identifications Abstract: The U.S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue (AC) using a modern reference system, the ACRS, which represents the system of the FK5. The data from the Oxford 2 Zone, whose plates are centered between declinations +32 and +33 degrees (eq. 1900), have been analyzed for scale, rotation, tilt, coma, magnitude equation, radial distortion and distortions introduced by the use of reseaux in the Carte du Ciel program. The result is a positional catalog of over 117,000 stars on eq. J2000.0, epoch of observation. Additionally, all stars have been matched with the Tycho Input Catalog (revised); those numbers have been added for additional identification purposes.