J/A+A/619/L3ivo://CDS.VizieR/J/A+A/619/L3doi:10.26093/cds/vizier.36199003CDSViikinkoski M.Vernazza P.Hanus J.Le Coroller H.Tazhenova K.,Carry B.Marsset M.Drouard A.Marchis F.Fetick R.Fusco T.,Durech J.Birlan M.Berthier J.Bartczak P.Dumas C.Castillo-Rogez J.,Cipriani F.Colas F.Ferrais M.Grice J.Jehin E.Jorda L.,Kaasalainen M.Kryszczynska A.Lamy P.Marciniak A.Michalowski T.,Michel P.Pajuelo M.Podlewska-Gaca E.Santana-Ros T.Tanga P.,Vachier F.Vigan A.Warner B.Witasse O.Yang B.2020-01-17T10:42:37Z2018-11-12T09:55:01ZCDS support team

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

cds-question@unistra.frasteroidssolar-systemgalaxy-classification-systemsAsteroid (16) Psyche is the target of the NASA Psyche mission. It is considered one of the few main-belt bodies that could be an exposed proto-planetary metallic core and that would thus be related to iron meteorites. Such an association is however challenged by both its near- and mid-infrared spectral properties and the reported estimates of its density. Here, we aim to refine the density of (16) Psyche to set further constraints on its bulk composition and determine its potential meteoritic analog. We observed (16) Psyche with ESO VLT/SPHERE/ZIMPOL as part of our large program (ID 199.C-0074). We used the high angular resolution of these observations to refine Psyche's three-dimensional (3D) shape model and subsequently its density when combined with the most recent mass estimates. In addition, we searched for potential companions around the asteroid. We derived a bulk density of 3.99+/-0.26g/cm^3^ for Psyche. While such density is incompatible at the 3-sigma level with any iron meteorites (~7.8g/cm^3^), it appears fully consistent with that of stony-iron meteorites such as mesosiderites (density ~4.25g/cm^3^). In addition, we found no satellite in our images and set an upper limit on the diameter of any non-detected satellite of 1460+/-200m at 150km from Psyche (0.2%xR_Hill_, the Hill radius) and 800+/-200m at 2000km (3%xRHill). Considering that the visible and near-infrared spectral properties of mesosiderites are similar to those of Psyche, there is merit to a long-published initial hypothesis that Psyche could be a plausible candidate parent body for mesosiderites.2018A&A...619L...3Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/L3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/L3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/L3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/L3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/L3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/L3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/L3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/619/L3/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/L3/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/L3/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/L3/list?GETtext/xml+votable180.050000true231.22-14.250360.0055555555555555566/44522 44823 44856 44864https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/619/L3?format=asciiOpticaldefaultJ/A+A/619/L3/tablea1Mass estimates of (16) Psyche collected in the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Sequential numbermeta.recordintnullablen_Seq[A] A for Averagemeta.notecharMassMasskgphys.massdoublee_Massrms uncertainty on Mass (3{sigma})kgstat.error;phys.massdoublerho? Computed density (using a diameter of 226.00+/-5.00)g.cm**-3phys.density;meta.modelledfloatnullablee_rho? rms uncertainty on rhog.cm**-3stat.errorfloatnullableMethMethod (1)meta.notecharSel[XV] Selection flag (V for yes)meta.codecharRefReferencemeta.ref;pos.framecharJ/A+A/619/L3/tablea2Diameter estimates of (16) Psyche collected in the literatureRefReference (1)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq? Sequential numbermeta.recordintnullablen_Seq[A] A for Averagemeta.notecharDiamDiameterkmphys.size.diameterfloate_Diamrms uncertainty on Diam (3{sigma})kmstat.errorfloatrho? Computed densityg.cm**-3phys.density;meta.modelledfloatnullablee_rho? rms uncertainty on rhog.cm**-3stat.errorfloatnullableMethMethod (1)meta.notecharSel[XV] Selection flag (V for yes)meta.codecharJ/A+A/619/L3/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scaledoubleNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation date (YYYY-MM-DDTHH:MM:SS.sss)stime.epoch;obsnullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar