ucac3.icrscorrivo://org.gavo.dc/ucac3/q/icrscorrThe GAVO DC teamGAVO Data Centrehttp://vo.ari.uni-heidelberg.de/docs/GavoTiny.png2009-10-01T00:00:00ZGAVO Data Centre Team

Mönchhofstrasse 12-14, D-69120 Heidelberg

gavo@ari.uni-heidelberg.de+49 6221 54 1837starssurveysastrometryproper-motionsCorrections between UCAC3 and the ICRS as represented by PPMXL on a grid of degrees, obtained by substracting UCAC3 from PPMXL in cones of radius sqrt(2)/2 degrees around the given center position.2010AJ....139.2184Zhttp://dc.g-vo.org/tableinfo/ucac3.icrscorrOptical1ucac3The Third US Naval Observatory CCD Astrograph catalogue (UCAC3) is an all-sky catalgoue containing just over 100 million objects covering about R = 8-16 mag. This table contains the original data content of UCAC3 but leaves out the data objetained by crossmatching to other catalogs.ucac3.icrscorrCorrections between UCAC3 and the ICRS as represented by PPMXL on a grid of degrees, obtained by substracting UCAC3 from PPMXL in cones of radius sqrt(2)/2 degrees around the given center position.65294nobNumber of objects the correction is based onmeta.number147.0620.07177.0600751.0intalphaCenter for field, RAdegpos.eq.ra;meta.main0.510.5180.5350.5360.51floatindexednullabledeltaCenter for field, Decdegpos.eq.dec;meta.main-89.5-84.50.585.590.51floatindexednullabled_alphaCorrection PPMXL-UCAC3 in alpha (Epoch 2000.0)degpos.eq.ra;arith.diff-0.0425202-0.0001459467.32904e-085.69315e-050.04112481floatnullabled_deltaCorrection PPMXL-UCAC3 in delta (Epoch 2000.0)degpos.eq.dec;arith.diff-0.000135361-1.07023e-051.19213e-061.56531e-050.0001475561floatnullabled_pmalphaCorrection PPMXL-UCAC3 in proper motion alpha*cos(delta)deg/yrpos.pm;pos.eq.ra;arith.diff-8.81235e-05-2.28867e-062.8376e-073.21312e-061.53264e-051floatnullabled_pmdeltaCorrection PPMXL-UCAC3 in deltadeg/yrpos.pm;pos.eq.dec;arith.diff-5.54408e-05-2.93633e-06-3.50119e-071.64512e-062.17293e-051floatnullable