J/A+A/383/296ivo://CDS.VizieR/J/A+A/383/296doi:10.26093/cds/vizier.33830296CDSPeng Q.Vienne A.Shen K.X.2021-02-22T08:35:19Z2002-03-07T22:15:26ZCDS support team

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

cds-question@unistra.frsolar-systemsolar-system-planetsastrometry199 frames of CCD images of the major satellites of Saturn (Mimas, Enceladus, Tethys, Dione, Rhea, Titan, Hyperion and Iapetus), obtained on 1-meter telescope at the Yunnan Observatory during the years of 1996-2000, are measured. These positions are compared to the ones computed with the Vienne & Duriez ephemerides (TASS1.7). The calibrated parameters of the CCD scale and orientation are determined by the comparison of their measurement coordinates with computed positions of four bright satellites of Tethy, Dione, Rhea and Titan. A catalog of 913 differential positions has been obtained. Analysis of the data as inter-satellite positions shows that these observations of the above mentioned four satellites have root-mean-square residuals of 0.04 arcsec in the sense of (O-C) (Observed minus Computed). The positional measuring procedure is proved to be good enough to obtain a small dispersion in the observations for the major Saturn satellites. The format of the present catalog are very near to the one of (Strugnell & Taylor, 1990A&AS...83..289S). The coordinates are corrected by all astrometric effects. So, these positions are really astrometric ones in that meaning that, no astrometric consideration is necessary to use them, even if one wants to touch up the calibration. Nevertheless, the raw pixels are also given in order to allow anyone to reduce again the frames.2002A&A...383..296Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/383/296CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/121/65 : 1990-1994 Saturn's satellites astrometry (Harper+ 1997)J/A+AS/136/257 : Saturn's satellites in 1995/97 (Harper+ 1999)J/A+AS/139/305 : Position of Saturn's satellites (1982-1988) (Veiga+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/383/296https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/383/296http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/383/296https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/383/296https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/383/296http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/383/296GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/383/296/table7The catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOppOpposition numbermeta.idintObs.Yobservations datetime.epoch;obsnullableTT-UTCTT-UTC differencestime.epochfloatObs[286] Observatory code from Minor Planet Centermeta.code;instr.obstycharRef[302] Reference code of the catalog (here 302)meta.id;meta.datasetcharObsType[0/1] Observation typemeta.noteintObjSubject satellite, reference satellitemeta.idcharNote[0/1] The flag of presence of both coordinatesmeta.notecharObsRAThe observed coordinates in Right Ascensionarcsecpos.eq.ra;arith.diffdoubleObsDEThe observed coordinates in Declinationarcsecpos.eq.dec;arith.diffdoubleRefSys[0/2] The reference systemmeta.noteintFrame[1] The reference frame. Here, 1=geocentricmeta.noteintO-CRA? Residuals of observations in Right Asensionarcsecstat.fit.residualfloatnullableO-CDE? Residuals of observations in Declinationarcsecstat.fit.residualfloatnullableRsatReference satellite when o-c is computedmeta.noteintNSerThe number of the seriesmeta.idintXpos? Original coordinate in X directionpixpos.cartesian.x;instr.detdoublenullableYpos? Original coordinate in Y directionpixpos.cartesian.y;instr.detdoublenullable