/ftp/cats/aliases/P/PPM_1_



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I/146             PPM North Star Catalogue              (Roeser+, 1988)
The following files can be converted to FITS (extension .fit .fit.Z .fgz)
	ppm1 ppma1
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Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/146
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drwxr-xr-x 283 cats archive 8192 Dec 18 15:59 [Up] drwxr-xr-x 2 cats archive 4096 Dec 15 2013 [TAR file] -rw-r--r-- 1 cats archive 451 Jun 13 2004 .message -r--r--r-- 1 cats archive 9533 Jun 12 2004 ReadMe -rw-r--r-- 1 cats archive 2749 Oct 25 2007 +footg5.gif -rw-r--r-- 1 cats archive 31610 Mar 5 2008 +footg8.gif -r--r--r-- 1 cats archive 65336 Jun 12 1991 desc.txt -r--r--r-- 1 cats archive 6733660 Jun 12 1991 ppm1.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 8309834 Jun 12 1991 ppma1.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/146 Positions and Proper Motions - North (Roeser+, 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. <Astron. Astrophys. Suppl. Ser. 74, 449 (1988)> =1988A&AS...74..449R (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Positional data ; Proper motions ; Description: PPM North gives J2000 positions and proper motions of 181731 stars north of -2.5 degrees declination. Its main purpose is to provide a convenient, dense, and accurate net of astrometric reference stars that represents the new IAU (1976) coordinate system on the sky. The mean epoch is near 1931. The average mean errors of the positions and proper motions are 0.27" and 0.43"/cen. On the average six measured positions are available per star; 1064 stars do not have sufficient redundancies to resolve discrepancies. In addition to the positions and proper motions, the PPM (North) contains the BD number, the magnitude, the spectral type, the number of positions included, the mean error of each component of the position and proper motion, the weighted mean epoch in each coordinate, the numbers in the SAO, HD, and AGK3 catalogs, and various standard notes. In addition a number of individual notes are given in the introduction. See file desc.txt for complete explanations provided by the authors.

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