========================================================================== V/145 SKY2000 Master Catalog, Version 5 (Myers+ 2006) The following files can be converted to FITS (extension .fit or fit.gz) sky2kv5.dat refs.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=V/145 ==========================================================================
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Beginning of ReadMe : V/145 SKY2000 Master Catalog, Version 5 (Myers+ 2006) ================================================================================ SKY2000 Master Catalog, Version 5 Myers J.R., Sande C.B., Miller A.C., Warren Jr. W.H., Tracewell D.A. <Goddard Space Flight Center, Flight Dynamics Division (2006)> =2015yCat.5145....0M ================================================================================ ADC_Keywords: Positional data; Cross identifications; Combined data; Surveys Description: The SKYMAP Star Catalog System consists of a Master Catalog stellar database and a collection of utility software designed to create and maintain the database and to generate derivative mission star catalogs (run catalogs). It contains an extensive compilation of information on almost 300000 stars brighter than 8.0mag. The original SKYMAP Master Catalog was generated in the early 1970's. Incremental updates and corrections were made over the following years but the first complete revision of the source data occurred with Version 4.0. This revision also produced a unique, consolidated source of astrometric information which can be used by the astronomical community. The derived quantities were removed and wideband and photometric data in the R (red) and I (infrared) systems were added. Version 4 of the SKY2000 Master Catalog was completed in April 2002; it marks the global replacement of the variability identifier and variability data fields. More details can be found in the description file sky2kv4.pdf. The SKY2000 Version 5 Revision 4 Master Catalog differs from Revision 3 in that MK and HD spectral types have been added from the Catalogue of Stellar Spectral Classifications (B. A. Skiff of Lowell Observatory, 2005), which has been assigned source code 50 in this process. 9622 entries now have MK types from this source, while 3976 entries have HD types from this source. SKY2000 V5 R4 also differs globally from preceding MC versions in that the Galactic coordinate computations performed by UPDATE have been increased in accuracy, so that differences from the same quantities from other sources are now typically in the last decimal places carried in the MC. This version supersedes the previous versions 1(V/95), 2(V/102), 3(V/105) and 4(V/109).