J/AJ/153/147ivo://CDS.VizieR/J/AJ/153/147doi:10.26093/cds/vizier.51530147CDSBrozovic M.Jacobson R.A.2018-09-25T12:09:45Z2018-05-29T15:18:17ZCDS support team

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

cds-question@unistra.frsolar-systemsolar-system-planetsephemeridesWe report on the improved ephemerides for the irregular Jovian satellites. We used a combination of numerically integrated equations of motion and a weighted least-squares algorithm to fit the astrometric measurements. The orbital fits for 59 satellites are summarized in terms of state vectors, post-fit residuals, and mean orbital elements. The current data set appears to be sensitive to the mass of Himalia, which is constrained to the range of GM=0.13-0.28 km^3^/s^2^. Here, GM is the product of the Newtonian constant of gravitation, G and the body's mass, M. Our analysis of the orbital uncertainties indicates that 11 out of 59 satellites are lost owing to short data arcs. The lost satellites hold provisional International Astronomical Union (IAU) designations and will likely need to be rediscovered.2017AJ....153..147Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/153/147CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/311/710 : Faint Jovian satellites ephemerides (Rocher+, 1996)J/A+AS/115/295 : Astrometry of outer Jovian satellites (Hernius+, 1996)J/A+A/383/724 : 1999-2000 CCD observations of inner Jovian moonsJ/A+A/453/349 : CCD positions for eight Jovian irregular satellitesJ/A+A/580/A76 : Positions of satellites of giant planets (Gomes-Junior+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/153/147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/153/147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/153/147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/153/147https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/153/147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/153/147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/AJ/153/147/table2Post-fit residual statisticsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatSatellite identifiermeta.id;meta.maincharb_Time[1894/2011] Time span, lower valueyrtime.interval;stat.minintB_Time[2003/2016]? Time span, upper valueyrtime.interval;stat.maxintnullableN1[8/3257] First number of points used in orbital fitmeta.numberintN2[309/3251]? Second number of points used in orbital fitmeta.numberintnullablermsRA[0.118/0.656] rms of the post-fit residuals in Right Ascension (1)arcsecstat.fit.residualfloatrmsDE[0.109/0.679] rms of the post-fit residuals in Declinationarcsecstat.fit.residualfloatsRA[0.395/1.056] Reduced rms of the post-fit residuals in Right Ascension (in {sigma} units) (1)stat.fit.residualfloatsDE[0.365/1.138] Reduced rms of the post-fit residuals in Declination (in {sigma} units)stat.fit.residualfloatJ/AJ/153/147/table3Jupiter barycentric state vectors at 2010 January 1 TDB referred to the ICRFrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatSatellite identifiermeta.id;meta.maincharPosPosition of state vector (1)kmpos.distancedoubleVelVelocity of state vector (1)km/sphys.veloc;pos.barycenterdoubleJ/AJ/153/147/table5Orbital uncertainties in the plane-of-sky, in-orbit, radial, and out-of-plane directionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatSatellite identifiermeta.id;meta.maincharYearYear center (1)yrtimecharP-S[0.02/1500]? Plane-of-sky uncertainty (2)arcsecstat.errorfloatnullableIn-O[37/5304000]? In-orbit uncertainty (3)kmstat.errorintnullableR[15/871400]? Radial uncertainty (3)kmstat.errorintnullableOut-P[24/36700]? Out-of-plane uncertainty (3)kmstat.errorintnullableJ/AJ/153/147/table6*Planetocentric mean orbital elements in ecliptic coordinates for 59 irregular jovian satellitesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroup[prj] Object group (1)src.classcharSatSatellite identifiermeta.id;meta.maincharaSemimajor axiskmphys.angSize.smajAxis;src.orbitallonge[0.045/0.491] Eccentricitysrc.orbital.eccentricityfloatInc[16.27/168.79] Inclinationdegsrc.orbital.inclinationfloatlambda[11.2/359.01] Mean longitude {lambda}degsrc.orbitalfloatomega[3.95/349.72] Longitude of periapsis {omega}degsrc.orbital.periastronfloatOmega[1.32/358.58] Longitude of the ascending node {Omega}degsrc.orbital.nodefloatdl/dt[0.0831/2.7688] Mean longitude rate d{lambda}/dtdeg/dsrc.orbitalfloatPer[130.02/4332.59] Orbital period P_{lambda}_dtime.periodfloatdo/dt[-3.1915/1.5737] Rate of apsidal precession d{omega}/dtdeg/yrarith.rate;pos.precessfloatdO/dt[-3.191/5.7262] Rate of nodal precession d{Omega}/dtdeg/yrarith.rate;pos.precessfloatnu[-1/1.23]? Ratio of apsidal and nodal precession rates {nu} (2)pos.precessfloatnullablel_Class[~] Limit flag on Classmeta.code.errorcharClassClassification based on a value of {nu} (3)src.classcharJ/AJ/153/147/table7Minimum and maximum values of osculating orbital elements, and their averages over 1000 yrrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatSatellite identifiermeta.id;meta.maincharb_aoscOsculating semimajor axis minimum valuekmphys.size.smajAxis;stat.minintaoscavgOsculating semimajor axis mean valuekmphys.angSize.smajAxis;src.orbitalintB_aoscOsculating semimajor axis maximum valuekmphys.size.smajAxis;stat.maxintb_eosc[0/0.29] Osculating eccentricity minimum valuesrc.orbital.eccentricity;stat.minfloateoscavg[0.104/0.485] Osculating eccentricity mean valuesrc.orbital.eccentricityfloatB_eosc[0.156/0.701] Osculating eccentricity maximum valuesrc.orbital.eccentricity;stat.maxfloatb_iosc[25.5/161] Osculating inclination minimum valuedegsrc.orbital.inclination;stat.minfloatioscavg[27.7/164.8] Osculating inclination mean valuedegsrc.orbital.inclinationfloatB_iosc[29.7/168.5] Osculating inclination maximum valuedegsrc.orbital.inclination;stat.maxfloat