J/AJ/123/2070ivo://CDS.VizieR/J/AJ/123/2070doi:10.26093/cds/vizier.51232070CDSTedesco E.F.Desert F.-X.2023-06-29T11:17:59Z2003-04-24T20:49:24ZCDS support team

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

cds-question@unistra.frasteroidssolar-systeminfrared-astronomyspectroscopyA total of six deep exposures (using the astronomical observation template CAM01 with a 6" pixel field of view) through the ISOCAM LW10 filter (IRAS band 1, i.e., 12{mu}m) were obtained on a ~15' square field centered on the ecliptic plane. Point sources were extracted using the technique described in 1999 by Deert et al. Twoknown asteroids appear in these frames, and 20 sources moving with velocities appropriate for main-belt asteroids are present. Most of the asteroids detected have flux densities less than 1 mJy, that is, between 150 and 350 times fainter than any of the asteroids observed by IRAS. These data provide the first direct measurement of the 12{mu}m sky-plane density for asteroids on the ecliptic equator. The median zodiacal foreground, as measured by ISOCAM during this survey, is found to be 22.1+/-1.5mJy/pixel, i.e. 26.2+/-1.7MJy/sr. The results presented here imply that the actual number of kilometer-sized asteroids may be higher than several recent estimates based upon observations at visual wavelengths and are in reasonable agreement with the statistical asteroid model. Using results from the observations presented here, together with three other recent population estimates, we conclude that the cumulative number of main-belt asteroids with diameters greater than 1km is (1.2+/-0.5)x10^6^.2002AJ....123.2070Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/2070CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/astorb : Orbits of Minor Planets (Bowell 1998)VII/91 : IRAS Asteroid and Comet Survey (Veeder+ 1986)J/A+A/338/340 : Asteroids as IR Standards for ISOPHOT (Mueller+ 1998)J/A+A/375/275 : Asteroidal I, J, K in the DENIS Survey (Baudrand+ 2001)J/AJ/112/2319 : Asteroid masses (Hilton+ 1996)Table 1: Map field centershttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/123/2070https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/123/2070http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/123/2070https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/123/2070https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/123/2070http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/123/2070GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/123/2070/table2 (All Point Sources Extracted from the Six IDAS Maps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/123/2070/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/123/2070/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/123/2070/table2?GETtext/xml+votable180.050000true339.73926889-8.684638060.005555555555555556Cone search capability for table J/AJ/123/2070/table3 (IDAS field inertial point sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/123/2070/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/123/2070/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/123/2070/table3?GETtext/xml+votable180.050000true339.502145-8.506748890.005555555555555556ISO6/185421.2932132981302573e-20 2.1346512726771855e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/123/2070?format=asciiInfrareddefaultJ/AJ/123/2070/table2All Point Sources Extracted from the Six IDAS MapsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[TD2002]Identification number, [TD2002] 2-NNNN (G1)meta.id;meta.mainintRAJ2000Decimal degree Right Ascension (J2000) (G2)degpos.eq.ra;meta.mainDEJ2000Decimal degree Declination (J2000) (G2)degpos.eq.dec;meta.mainFDFlux density in LW10 band (~IRAS 12{mu}m)mJyphot.flux.density;em.IR.8-15uminte_FDThe 1 {sigma} uncertainty in FDmJystat.errorintSNRSignal-to-noise ratiostat.snrfloatQ1Quality 1 code (3)meta.codeintQ2Quality 2 code (4)meta.codeintQ3Quality 3 code of source detection (5)meta.code.qual;instr.saturationintJDJulian Date of midpoint of observationdtime.epochdoubleG[0,1] Brigher source code (6)meta.codeintC[0,1] Multiply-sample region code (7)meta.codeintRmagRed magnitude from the USNO-A2 catalog (G3)magphot.mag;em.opt.RfloatUSNOName from the from the USNO-A2 catalog (G3)meta.id.crosscharAssNumber of USNO-A2 sources associated with the ISO source (G3)meta.numberintUNumNumber from the USNO-A2 catalog (G3)obs.fieldintDistDistance from USNO-A2 catalog source (9)arcsecpos.angDistancefloatDistRADistance in RA from USNO-A2 catalog source (10)arcsecpos.angDistance;pos.eq.raintDistDEDistance in DE from USNO-A2 catalog source (10)arcsecpos.angDistance;pos.eq.decintOptList all (optical) USNO-A2.0 sources within 1'meta.ref.urlcharJ/AJ/123/2070/table3IDAS field inertial point sourcesSNRSignal-to-noise ratiostat.snrfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[TD2002]Identification number, [TD2002] 3-NN (G1)meta.id;meta.mainintRAJ2000Right ascension, in decimal degrees (J2000.0) (G2)degpos.eq.ra;meta.mainDEJ2000Declination, in decimal degrees (J2000.0) (G2)degpos.eq.dec;meta.mainFDFlux density in LW10 band (~IRAS 12{mu}m)mJyphot.flux.density;em.IR.8-15uminte_FDThe 1 {sigma} uncertainty in FDmJystat.errorintRmag? Red magnitude from the USNO-A2 catalog (G3)magphot.mag;em.opt.RfloatnullableUSNOName from the from the USNO-A2 catalog (G3)meta.id.crosscharAssNumber of USNO-A2 sources associated with the ISO source, separated by comma (G3)meta.numbercharOptList all (optical) USNO-A2.0 sources within 1'meta.ref.urlchar