J/A+A/553/A36ivo://CDS.VizieR/J/A+A/553/A36doi:10.26093/cds/vizier.35530036CDSDesmars J.Li S.N.Tajeddine R.Peng Q.Y.Tang Z.H.2018-02-01T11:50:43Z2013-04-29T08:41:39ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsolar-system-planetsastrometryThe ephemeris of Phoebe, the ninth satellite of Saturn, is not very accurate. Previous dynamical models were usually too simplified, the astrometry is heterogeneous and, the Saturn's ephemeris itself is an additionnal source of error. The aim is to improve Phoebe's ephemeris by using a large set of observations, correcting some systematic errors and updating the dynamical model.2013A&A...553A..36Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/553/A36CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/other/KFNT/15.483 : Positions of Thebe and Amalthea (Ledovskaya+ 1999)J/A+A/391/767 : CCD observations of Phoebe in 1998-1999 (Fienga+, 2002)J/A+A/454/379 : 2003-2004 Phoebe CCD astrometry (Qiao+, 2006)J/A+A/493/1183 : Saturn major satellites observations (1874-2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/553/A36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/553/A36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/553/A36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/553/A36https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/553/A36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/553/A36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/553/A36/table5Statistics of astrometric residualsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCode[13/500] Bibliographic codemeta.idintprimaryRefReferenceobs.observercharnaNumber of accepted observationsmeta.numberintntTotal number of observationsmeta.numberintmu1? Mean of the residuals in right ascension (1)arcsecstat.fit.residualdoublenullablemu2? Mean of the residuals in declination (1)arcsecstat.fit.residualdoublenullablerms1? Root mean square of the residuals in R.A. (1)arcsecstat.errordoublenullablerms2? Root mean square of the residuals in Dec. (1)arcsecstat.errordoublenullableTimeTime-span (year1-year2)yrtime.expocharFlag[*] Symbol of correction of bias (2)meta.code.errorcharBibCodeBibCode, mainly from ADSmeta.bib.bibcodecharCommComplete reference if no BibCodemeta.notecharJ/A+A/553/A36/cop2012Catalogue of ground-based observations of PhoeberecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOpp[280/390] Opposition number (1)meta.idintDateUTC date of observation (YYYY/MM/DD.ddddddd)time.epoch;obschardtTT-UTC (seconds)stime.epochfloatObsObservatory code (2)meta.code;instr.obstycharCode[13/500] Reference code, in table5.datmeta.idintObs1First coordinate of pairdegobs.paramdoubleObs2Second coordinate of pairdegobs.paramdoubleSys[0/7] Reference system (6)obs.fieldintFr[0/1] Reference frame (7)obs.fieldint(O-C)1[-5/5]? (O-C) residual for first coordinate ({alpha}) (8)arcsecstat.fit.residualfloatnullable(O-C)2[-5/5]? (O-C) residual for second coordinate ({delta}) (8)arcsecstat.fit.residualfloatnullablerf[0/1] Refraction correction (9)arith.factorintab[0/3] Aberration correction (9)arith.factorintCatCatalogue used for reduction (10)instr.setup;meta.tablecharxbBias in right ascensionarcsecstat.errorfloatybBias in declinationarcsecstat.errorfloatw1Estimated variance of first coordinate (11)arcsecstat.variancefloatw2Estimated variance of second coordinate (11)arcsecstat.variancefloatinfoInformation (12)meta.notechar