J/A+A/623/A132ivo://CDS.VizieR/J/A+A/623/A132doi:10.26093/cds/vizier.36230132CDSCarry B.Vachier F.Berthier J.Marsset M.Vernazza P.Grice J.,Merline W. J.Lagadec E.Fienga A.Conrad A.Podlewska-Gaca E.,Santana-Ros T.Viikinkoski M.Hanus J.Dumas C.Drummond J. D.,Tamblyn P. M.Chapman C. R.Behrend R.Bernasconi L.Bartczak P.,Benkhaldoun Z.Birlan M.Castillo-Rogez J.Cipriani F.Colas F.,Drouard A.Durech J.Enke B. L.Fauvaud S.Ferrais M.Fetick R.,Fusco T.Gillon M.Jehin E.Jorda L.Kaasalainen M.Keppler M.,Kryszczynska A.Lamy P.Marchis F.Marciniak A.Michalowski T.,Michel P.Pajuelo M.Tanga P.Vigan A.Warner B.Witasse O.,Yang B.Zurlo A.2020-01-17T12:26:27Z2019-03-20T06:02:37ZCDS support team

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

cds-question@unistra.frsolar-systemasteroidsCM-like asteroids (Ch and Cgh classes) are a major population within the broader C-complex, encompassing about 10% of the mass of the main asteroid belt. Their internal structure has been predicted to be homogeneous, based on their compositional similarity as inferred from spectroscopy (Vernazza et al., 2016AJ....152..154G) and numerical modeling of their early thermal evolution (Bland & Travis, 2017, Sci. Adv. 3, e1602514). Here we aim to test this hypothesis by deriving the density of the CM-like asteroid (41) Daphne from detailed modeling of its shape and the orbit of its small satellite. We observed Daphne and its satellite within our imaging survey with the Very Large Telescope extreme adaptive-optics SPHERE/ZIMPOL camera (ID 199.C-0074, PI P. Vernazza) and complemented this data set with earlier Keck/NIRC2 and VLT/NACO observations. We analyzed the dynamics of the satellite with our Genoid meta-heuristic algorithm. Combining our high-angular resolution images with optical lightcurves and stellar occultations, we determine the spin period, orientation, and 3-D shape, using our ADAM shape modeling algorithm. The satellite orbits Daphne on an equatorial, quasi-circular, prograde orbit, like the satellites of many other large main-belt asteroids. The shape model of Daphne reveals several large flat areas that could be large impact craters. The mass determined from this orbit combined with the volume computed from the shape model implies a density for Daphne of 1.77+/-0.26g/cm^3^ (3{sigma}). This density is consistent with a primordial CM-like homogeneous internal structure with some level of macroporosity (~17%). Based on our analysis of the density of Daphne and 75 other Ch/Cgh-type asteroids gathered from the literature, we conclude that the primordial internal structure of the CM parent bodies was homogeneous.2019A&A...623A.132Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/623/A132CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php : DAMIT Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/623/A132https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/623/A132http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/623/A132https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/623/A132https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/623/A132http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/623/A132GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/623/A132/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/623/A132/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/623/A132/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/623/A132/list?GETtext/xml+votable180.050000true140.97533-2.775980.0055555555555555566/4355 18878 23203 25754 26022 26419 26516 26518 27267 27485 30497https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/623/A132?format=asciidefaultJ/A+A/623/A132/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.fitscharJ/A+A/623/A132/spinSpin parameter of the shape modelrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLongPEcliptic longitude of the pole (J2000)degpos.ecliptic.londoubleLatPEcliptic latitude of the pole (J2000)degpos.ecliptic.latdoubleperiodSidereal rotation periodhtime.perioddoublet0Reference epoch (Julian date, JD)dmeta.ref;time.epochdoublephi0Ecliptic latitude of the pole (J2000)degpos.ecliptic.latint