/ftp/cats/I/6



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I/6     Cape Catalog of 20554 Faint Stars, -40 to -52deg (Spencer Jones+ 1939)
The following files can be converted to FITS (extension .fit or fit.gz)
	faint.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/6
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 4096 Jan 13 2023 [TAR file] -rw-r--r-- 1 cats archive 457 Dec 19 2022 .message -r--r--r-- 1 cats archive 5873 Jan 10 2011 ReadMe -rw-r--r-- 1 cats archive 1461 Nov 16 2012 +footg5.gif -rw-r--r-- 1 cats archive 7176 Nov 16 2012 +footg8.gif -rw-r--r-- 1 cats archive 1056 Apr 6 2011 errata.htx -r--r--r-- 1 cats archive 441990 Jan 10 2011 faint.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/6 Cape Catalog of 20554 Faint Stars, -40 to -52deg (Spencer Jones+ 1939) ================================================================================ Catalogue of 20554 Faint Stars in the Cape Astrographic Zone -40 to -52 Degrees for the Equinox of 1900.0 Spencer J.H., Jackson J. <His Majesty's Stationery Office, London (1939)> =1939HMSO..C......0S ================================================================================ ADC_Keywords: Positional data ; Proper motions Description: This catalog contains positions, precessions, proper motions, and photographic magnitudes for 20,554 stars. These were derived from photographs taken at the Royal Observatory, Cape of Good Hope between 1923 and 1928. It covers the astrographic zones -40 degrees to -52 degrees of declination. The positions are given for epoch 1900 (1900.0). It includes spectral types for many of the stars listed. It extends the earlier catalogs derived from the same plates to fainter magnitudes. The computer-readable version consists of a single data table. The stated probable error for the star positions is 0.024 seconds of time (R.A.) and 0.25 seconds of arc (Dec.) for stars with one determination, 0.017 seconds of time, and 0.18 seconds of arc for two determinations, and 0.014 / 0.15 for stars with three determinations. The precession and secular variations were derived from Newcomb's constants. The authors quote probable errors of the proper motions in both coordinates of 0.008 seconds of arc for stars with one determination, 0.0055 seconds for stars with two determinations, and 0.0044 for stars with three. The photographic magnitudes were derived from the measured diameters on the photographic plates and from the magnitudes given in the Cape Photographic Durchmusterung. The spectral classification of the catalogued stars was done with the assistance of Annie Jump Cannon of the Harvard College Observatory. The user should consult the source reference for more details of the measurements and reductions. See also the notes in this document for additional information on the interpretation of the entries.