J/other/RSPTA/38ivo://CDS.VizieR/J/other/RSPTA/383.189CDSPereira C.L.Braga-Ribas F.Sicardy B.Morgado B.E.Ortiz J.L.,Assafin M.Miles R.Desmars J.Camargo J.I.B.Benedetti-Rossi G.,Kretlow M.Vieira-Martins R.2025-06-02T07:05:25Z2025-05-30T14:08:06ZCDS support team

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

cds-question@unistra.frsolar-systemcometsphotometryvisible-astronomyComets offer valuable insights into the early Solar System's conditions and processes. Stellar occultations enables detailed study of cometary nuclei typically hidden by their coma. Observing the star's light passing through the coma helps infer dust's optical depth near the nucleus and determine dust opacity detection limits. 29P/Schwassmann-Wachmann 1, a Centaur with a diameter of approximately 60km, lie s in a region transitioning from Centaurs to Jupiter-Family comets. Our study presents the first-ever occultation by 29P, refining its orbit and predicting future occultations more precisely. We identified features around 1700km from the nucleus in the sky plane for which upper limits on apparent opacity and equivalent width were determined. Gradual dimming within 23km of the nucleus during ingress only is interpreted as a localised dust cloud above the surface, with an optical depth of approximately tau=0.18.2025RSPTA.38340189Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RSPTA/383.189CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RSPTA/383.189https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RSPTA/383.189http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RSPTA/383.189https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RSPTA/383.189https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RSPTA/383.189http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RSPTA/383.189GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/other/RSPTA/383.189/precaLight curve containing SOAR observation and the modeled identified feature before the closest approachrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date of mid-exposure observationdtime.epochdoubleTimeSeconds relative to 2022-12-05 00:00:00.000 UTCstime;arith.diffdoubleFobsNormalised observed fluxphot.flux;arith.ratiodoubleFfitNormalised best fitted modelled fluxphot.flux;meta.modelleddoubleresResidual O-Cstat.fit.residual;stat.fit.omcdoubleJ/other/RSPTA/383.189/postcaLight curve containing SOAR observation and the modeled identified feature after the closest approachrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date of mid-exposure observationdtime.epochdoubleTimeSeconds relative to 2022-12-05 00:00:00.000 UTCstime;arith.diffdoubleFobsNormalised observed fluxphot.flux;arith.ratiodoubleFfitNormalised best fitted modelled fluxphot.flux;meta.modelleddoubleresResidual O-Cstat.fit.residual;stat.fit.omcdoubleJ/other/RSPTA/383.189/soarnLight curve containing SOAR observation and the modeled occultation by the nucleusrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date of mid-exposure observationdtime.epochdoubleTimeSeconds relative to 2022-12-05 00:00:00.000 UTCstime;arith.diffdoubleFobsNormalised observed fluxphot.flux;arith.ratiodoubleFfitNormalised best fitted modelled fluxphot.flux;meta.modelleddoubleresResidual O-Cstat.fit.residual;stat.fit.omcdoubleJ/other/RSPTA/383.189/soarnpcLight curve containing SOAR observation and the modeled occultation by the nucleus plus the proposed dust cloudrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date of mid-exposure observationdtime.epochdoubleTimeSeconds relative to 2022-12-05 00:00:00.000 UTCstime;arith.diffdoubleFobsNormalised observed fluxphot.flux;arith.ratiodoubleFfitNormalised best fitted modelled fluxphot.flux;meta.modelleddoubleresResidual O-Cstat.fit.residual;stat.fit.omcdouble