J/A+A/545/A144ivo://CDS.VizieR/J/A+A/545/A144doi:10.26093/cds/vizier.35450144CDSPasewaldt A.Oberst J.Willner K.Waehlisch M.Hoffmann H.Matz K.-D.,Roatsch T.Hussmann H.Lupovka V.2012-12-24T15:37:26Z2012-09-24T07:25:18ZCDS support team

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

cds-question@unistra.frsolar-system-planetsastrometryBetween July 2005 and July 2011 Mars Express performed 50 Deimos approaches. 156 SRC images were acquired and used for astrometric (positional) measurements of the small Martian satellite. For this study, we have developed a new technique, where the center-of-figure of the odd-shaped Deimos was determined by fitting the predicted to the observed satellite limb. The prediction of the limb was made based on the moon's known shape model. The camera pointing was verified and corrected by means of background star observations. We obtained a set of spacecraft- centered Deimos coordinates with accuracies between 0.6 and 3.6km (1 sigma). Comparisons with current orbit models indicate that Deimos is ahead or falling behind its predicted position along its track by as much as +3.7km or -4.4km, respectively, depending on the chosen model. Our data may be used to improve the orbit models of the satellite.2012A&A...545A.144Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/545/A144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/487/755 : CCD observations of Martian Satellites (Veiga+, 2008)J/A+A/488/361 : Mars Express astrometric observations of Phobos (Willner+ 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/545/A144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/545/A144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/545/A144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/545/A144https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/545/A144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/545/A144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/545/A144/table1 (Astrometric observations of Deimos relative to the Mars Express spacecraft position)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/545/A144/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/545/A144/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/545/A144/table1?GETtext/xml+votable180.050000true37.68931.85760.0055555555555555566/1408 1412 5093 5348 5350 5366 5372 5724 5726 5940 6149 6151 6899 6905 7114 7122 9126 10682 10789 10800 10814 10900 16628-16629 16689 16692 17784 22688-22689 22769 22771 23398 23404 23657 23770-23771 24219 24240-24241 26320 26322 26368 26370 26409 26546 26566-26567 27880 27978 28000-28001 28378 28400-28401 28450 28731 28981 29024 29461 31284 36345 36828 46510 47648-47649 47919https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/545/A144?format=asciidefaultJ/A+A/545/A144/table1Astrometric observations of Deimos relative to the Mars Express spacecraft positionImageImage Nameobs.imagecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsImage acquisition date (UTC)stime.epoch;obs.imagenullableRAJ2000Right ascension (J2000.0) wrt spacecraft positiondegpos.bodyrcDEJ2000Declination (J2000.0) wrt spacecraft positiondegpos.bodyrce_PosOne sigma error of Right ascension/Declinationdegstat.errorfloatXposX coordinate of Mars Express spacecraft in Mars-centered J2000.0 framekmpos.framedoubleYposY coordinate of Mars Express spacecraft in Mars-centered J2000.0 framekmpos.framedoubleZposZ coordinate of Mars Express spacecraft in Mars-centered J2000.0 framekmpos.framedouble