J/ApJ/744/197ivo://CDS.VizieR/J/ApJ/744/197doi:10.26093/cds/vizier.17440197CDSGrav T.Mainzer A.K.Bauer J.Masiero J.Spahr T.McMillan R.S.,Walker R.Cutri R.Wright E.Eisenhardt P.R.Blauvelt E.DeBaun E.,Elsbury D.Gautier T.Gomillion S.Hand E.Wilkins A.2017-11-06T12:24:02Z2013-08-05T08:46:46ZCDS support team

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

cds-question@unistra.frasteroidsinfrared-sourcessurveysWe present the preliminary analysis of 1023 known asteroids in the Hilda region of the solar system observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WISE). The sizes of the Hildas observed range from ~3 to 200km. We find no size-albedo dependency as reported by other projects. The albedos of our sample are low, with a weighted mean value of p_V_=0.055+/-0.018, for all sizes sampled by the NEOWISE survey. We observed a significant fraction of the objects in the two known collisional families in the Hilda population. It is found that the Hilda collisional family is brighter, with a weighted mean albedo of p_V_=0.061+/-0.011, than the general population and dominated by D-type asteroids, while the Schubart collisional family is darker, with a weighted mean albedo of p_V_=0.039+/-0.013. Using the reflected sunlight in the two shortest WISE bandpasses, we are able to derive a method for taxonomic classification of ~10% of the Hildas detected in the NEOWISE survey. For the Hildas with diameter larger than 30km, there are 67^+7^_-15_% D-type asteroids and 26^+17^_-5_% C-/P-type asteroids (with the majority of these being P-types).2012ApJ...744..197Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/744/197CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2013)II/311 : WISE All-Sky Data Release (Cutri+ 2012)J/ApJ/743/156 : NEOWISE obs. of NEOs: preliminary results (Mainzer+, 2011)J/ApJ/742/40 : Jovian Trojans asteroids with WISE/NEOWISE (Grav+, 2011)J/ApJ/741/68 : Main Belt asteroids with WISE/NEOWISE. I. (Masiero+, 2011)http://wise.ssl.berkeley.edu/ : WISE home pagehttp://www.minorplanetcenter.org/ : IAU Minor Planet Center home pagehttp://sirrah.troja.mff.cuni.cz/~mira/mp/trojans_hildas/ : Synthetix properhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/744/197https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/744/197http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/744/197https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/744/197https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/744/197http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/744/197GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/ApJ/744/197/table1*Thermal model fitsNameSimbad column added by the CDSmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPCTrojan asteroid name; MPC formatmeta.idcharHMagAbsolute H band magnitudemagphys.magAbs;em.IR.HfloatGMagnitude slope parameterarith.grad;stat.paramfloatDiamDiameterkmphys.size.diameterfloate_DiamStatistical error in Diam (1)kmstat.errorfloatpVOptical geometrical albedophys.albedofloate_pVStatistical error in pV (1)stat.errorfloatetaBeaming parameter {eta} (takes into account the thermal inertia)stat.fit.paramfloate_etaStatistical error in eta (1)stat.error;phys.electron.degenfloatpIRIR geometrical albedophys.albedofloate_pIRStatistical error in pIR (1)stat.errorfloatN1Number of WISE W1 (3.3um) observationsmeta.numberintN2Number of WISE W2 (4.6um) observationsmeta.numberintN3Number of WISE W3 (11.6um) observationsmeta.numberintN4Number of WISE W4 (22.1um) observationsmeta.numberint