The fifth U.S. Naval Observatory CCD Astrograph Catalog (UCAC5) 1000 2017-02-27T08:28:00Z New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8 to 11 magnitude range as reference star catalog. Significant improvements in the astrometric solutions were obtained and the UCAC5 catalog of mean positions at a mean epoch near 2001 was generated. By combining UCAC5 with Gaia DR1 data new proper motions on the Gaia coordinate system for over 107 million stars were obtained with typical accuracies of 1 to 2 mas/yr (R = 11 to 15 mag), and about 5 mas/yr at 16th mag. Proper motions of most TGAS stars are improved over their Gaia data and the precision level of TGAS proper motions is extended to many millions more, fainter stars. The database table uses actual NULLs for missing photometry, and all angular coordinates have been homogenised to degrees. 2017arXiv170205621Z Zacharias, N.; Finch, C.; Frouard, J. surveys astrometry proper-motions Optical 2015-01-01 2015-01-01 0/0-11 8.277e-20 4.138e-19 Position ICRS Epoch J2015.0 "ra" "dec" Error "ra_error" "dec_error" Velocity "pmra" "pmde" Error "sigpmr" "sigpmd" Position ICRS Epoch "epu" "ra_ucac" "de_ucac" Velocity "pmra" "pmde" Error "sigpmr" "sigpmd" shortName: UCAC 5 testQuery.ra: 208.82855 testQuery.dec: -59.70276 testQuery.sr: 0.001 cone/scs.xml row = self.getFirstVOTableRow() self.assertEqual(row["source_id"], '5867576683902312192') self.assertAlmostEqual(row["rmag"], 13.449999809265137) self.assertAlmostEqual(row["pmde"], -2.333330030523939e-06) /tap/sync for group in self.getXpath( "//v:GROUP[utype='stc:CatalogEntryLocation']"): if self.getXpath( "v:FIELDref[utype='stc:AstroCoords.Position2D.Value2.C1']", group)[0].get("ref")=="ra_ucac": # UCAC position annotation, epoch is in column self.assertEqual( self.getXpath( "v:FIELDref[utype='stc:AstroCoords.Position2D.Epoch']", group)[0].get("ref"), "epu") else: # Gaia position annotation, epoch is a literal self.assertEqual( self.getXpath( "v:PARAM[utype='stc:AstroCoords.Position2D.Epoch']", group)[0].get("value"), "2015.0") self.assertEqual( self.getXpath( "v:PARAM[utype='stc:AstroCoords.Position2D.Epoch.yearDef']", group)[0].get("value"), "J")