J/AJ/155/184ivo://CDS.VizieR/J/AJ/155/184doi:10.26093/cds/vizier.51550184CDSGraykowski A.Jewitt D.2019-01-07T09:03:10Z2018-11-27T13:50:50ZCDS support team

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

cds-question@unistra.frsolar-systemsolar-system-planetsinfrared-photometryvisible-astronomybroad-band-photometryIt is widely recognized that the irregular satellites of the giant planets were captured from initially heliocentric orbits. However, the mechanism of capture and the source region from which they were captured both remain unknown. We present an optical color survey of 43 irregular satellites of the outer planets conducted using the LRIS camera on the 10 m telescope at the Keck Observatory in Hawaii. The measured colors are compared to other planetary bodies in search for similarities and differences that may reflect upon the origin of the satellites. We find that ultrared matter (with color index B-R>=1.6), while abundant in the Kuiper Belt and Centaur populations, is depleted from the irregular satellites. We also use repeated determinations of the absolute magnitudes to make a statistical estimate of the average shape of the irregular satellites. The data provide no evidence that the satellites and the main-belt asteroids are differently shaped, consistent with collisions as the major agent shaping both.2018AJ....155..184Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/184CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/183 : UBVRI Photometric Standards (Landolt 1992)J/A+AS/138/247 : Uranian satellites 1995-1998 (Veiga+, 1999)J/A+A/453/349 : CCD positions for eight Jovian irregular satellitesJ/other/SoSyR/45.523 : CCD observations of saturnian satellitesJ/A+A/572/A43 : Saturnian satellites Cassini ISS astrometryJ/A+A/575/A73 : Astrometry of the Saturnian satellites 2004-12J/A+A/582/A8 : Astrometry of the main satellites of UranusJ/AJ/149/27 : Cassini ISS astrometry of Saturnian satellitesJ/MNRAS/462/1351 : Outer satellites occultation predictionsJ/AJ/153/147 : The orbits of Jupiter's irregular satellitesJ/A+A/610/A2 : Saturnian satellites Cassini ISS astrometryhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/184https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/184http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/184https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/184https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/184http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/184GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/AJ/155/184/table3Adopted absolute magnitudes and colorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetPlanet name (Jupiter, Neptune, Saturn, Uranus)meta.id.parentcharSatSatellite namemeta.id;instr.obstycharRMag[4.26/15.93] Absolute magnitude in the R filtermagphys.magAbs;em.opt.Rfloate_RMag[0.01/0.15] Uncertainty in RMagmagstat.error;phot.mag;em.opt.RfloatB-V[0.57/0.97]? Absolute B-V color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V[0.01/0.11]? 1{sigma} uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-R[0.23/0.66]? Absolute V-R color indexmagphot.color;em.opt.V;em.opt.Rfloatnullablee_V-R[0.01/0.13]? 1{sigma} uncertainty in V-Rmagstat.error;phot.color;em.opt.VfloatnullableB-R[0.91/1.63]? Absolute B-R color indexmagphot.color;em.opt.B;em.opt.Rfloatnullablee_B-R[0.01/0.15]? 1{sigma} uncertainty in B-Rmagstat.error;phot.color;em.opt.BfloatnullableJ/AJ/155/184/table2Geometry and photometrySatSatellite namemeta.id;instr.obstycharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanetPlanet name (Jupiter, Neptune, Saturn, Uranus)meta.id.parentcharDateUT date of the integration starttime.startnullableTime1First time of range of integrationtime.epochnullableTime2Last time of range of integrationtime.epochnullablerH[4.89/30.06] Heliocentric distanceAUpos.distance;pos.heliocentricfloatDelta[3.89/29.31] Geocentric distance {Delta}AUpos.distance;pos.geocentricfloatalpha[0.08/11.5] Phase angle {alpha}degpos.phaseAngfloatRmag[15.88/25.34] Apparent magnitude in the R filtermagphot.mag;em.opt.Rfloate_Rmag[0.01/0.31] 1{sigma} uncertainty in Rmagmagstat.error;phot.mag;em.opt.RfloatB-V[0.58/1.03]? B-V color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V[0.01/0.18]? 1{sigma} uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatnullableV-R[0.24/0.84]? V-R color indexmagphot.color;em.opt.V;em.opt.Rfloatnullablee_V-R[0.01/0.42]? 1{sigma} uncertainty in V-Rmagstat.error;phot.color;em.opt.VfloatnullableB-R[0.83/1.63]? B-R color indexmagphot.color;em.opt.B;em.opt.Rfloatnullablee_B-R[0.01/0.18]? 1{sigma} uncertainty in B-Rmagstat.error;phot.color;em.opt.Bfloatnullable