J/AJ/158/159ivo://CDS.VizieR/J/AJ/158/159doi:10.26093/cds/vizier.51580159CDSBenedetti-Rossi G.Santos-Sanz P.Ortiz J.L.Assafin M.Sicardy B.,Morales N.Vieira-Martins R.Duffard R.Braga-Ribas F.Rommel F.L.,Camargo J.I.B.Desmars J.Colas A.F.Vachier F.Alvarez-Candal A.,Fernandez-Valenzuela E.Almenares L.Artola R.Baum T.-P.Behrend R.,Berard D.Bianco F.B.Brosch N.Ceretta A.Colazo C.A.,Gomes-Junior A.R.Ivanov V.D.Jehin E.Kaspi S.Lecacheux J.Maury A.,Melia R.Moindrot S.Morgado B.Opitom C.Peyrot A.Pollock J.,Pratt A.Roland S.Spagnotto J.Tancredi G.Teng J.-P.Cacella P.,Emilio M.Feys F.Gil-Hutton R.Jacques C.Machado D.I.Malacarne M.,Manulis I.Milone A.C.Rojas G.Sfair R.2020-04-08T08:33:20Z2019-12-10T06:49:29ZCDS support team

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

cds-question@unistra.frsolar-systemasteroidsastrometryWe present results from three world-wide campaigns that resulted in the detections of two single-chord and one multi-chord stellar occultations by the plutino object (84922) 2003 VS_2_. From the single-chord occultations in 2013 and 2014 we obtained accurate astrometric positions for the object, while from the multi-chord occultation on 2014 November 7, we obtained the parameters of the best-fitting ellipse to the limb of the body at the time of occultation. We also obtained short-term photometry data for the body in order to derive its rotational phase during the occultation. The rotational light curve present a peak-to-peak amplitude of 0.141+/-0.009 mag. This allows us to reconstruct the 3D shape of the body, with principal semi-axes of a=313.8+/-7.1 km, b=265.5_-9.8_^+8.8^ km, and c=247.3_-43.6_^+26.6^ km, which is not consistent with a Jacobi triaxial equilibrium figure. The derived spherical volume equivalent diameter of 548.3_-44.6_^+29.5^ km is about 5% larger than the radiometric diameter of 2003 VS_2_ derived from Herschel data of 523+/-35 km, but still compatible with it within error bars. From those results we can also derive the geometric albedo (0.123_-0.014_^+0.015^) and, under the assumption that the object is a Maclaurin spheroid, the density {rho}=1400_-300_^+1000^ for the plutino. The disappearances and reappearances of the star during the occultations do not show any compelling evidence for a global atmosphere considering a pressure upper limit of about 1 microbar for a pure nitrogen atmosphere, nor secondary features (e.g., rings or satellite) around the main body.2019AJ....158..159Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/158/159CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2009)J/A+A/505/1283 : (84922) 2003 VS2 differential light curve (Duffard+, 2009)J/A+A/522/A93 : Short-term variability of 29 minor planets (Thirouin+, 2010)J/A+A/561/A37 : Prediction of stellar occultations 2012.5-2014https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/158/159https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/158/159http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/158/159https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/158/159https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/158/159http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/158/159GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/158/159/table3 (Astrometric positions for VS2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/158/159/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/158/159/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/158/159/table3?GETtext/xml+votable180.050000true68.052630833333.60346111110.0055555555555555566/1150 1223 1228https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/158/159?format=asciidefaultJ/AJ/158/159/table3Astrometric positions for VS2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation (in decimal days)time.epochnullableRA_ICRSDegree of Right Ascension (ICRS)pos.eq.ra;meta.mainDE_ICRSDegree of Declination (ICRS)pos.eq.dec;meta.mainSiteIAU code (1)meta.codechar