J/A+A/584/A96ivo://CDS.VizieR/J/A+A/584/A96doi:10.26093/cds/vizier.35840096CDSDesmars J.Camargo J.I.B.Braga-Ribas F.Vieira-Martins R.Assafin M.,Vachier F.Colas F.Ortiz J.L.Duffard R.Morales N.Sicardy B.,Gomes-Junior A.R.Benedetti-Rossi G.2015-11-27T11:10:15Z2015-11-27T12:06:53ZCDS support team

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

cds-question@unistra.frasteroidsephemeridesastrometryThe prediction of stellar occultations by trans-Neptunian objects (TNOs) and Centaurs is a difficult challenge that requires accuracy both in the occulted star position and in the object ephemeris. Until now, the most used method of prediction, involving dozens of TNOs/Centaurs, has been to consider a constant offset for the right ascension and for the declination with respect to a reference ephemeris, usually the latest public version. This offset is determined as the difference between the most recent observations of the TNO/Centaur and the reference ephemeris. This method can be successfully applied when the offset remains constant with time, i.e. when the orbit is stable enough. In this case, the prediction even holds for occultations that occur several days after the last observations. This paper presents an alternative method of prediction, based on a new accurate orbit determination procedure, which uses all the available positions of the TNO from the Minor Planet Center database, as well as sets of new astrometric positions from unpublished observations. Orbits were determined through a numerical integration procedure called NIMA, in which we developed a specific weighting scheme that considers the individual precision of the observation, the number of observations performed during one night by the same observatory, and the presence of systematic errors in the positions.2015A&A...584A..96Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/584/A96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/189/336 : HST astrometry of TNOs (Benecchi+, 2010)J/A+A/541/A142 : Prediction of stellar occultations 2008-2015 (Assafin+, 2012)J/A+A/561/A37 : Prediction of stellar occultations 2012.5-2014 (Camargo+ 2014)J/A+A/569/A3 : Rotational properties of TNOs (Thirouin+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/584/A96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/584/A96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/584/A96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/584/A96https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/584/A96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/584/A96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/584/A96/tnoobs (Table of ground-based observations of TNOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/584/A96/tnoobs?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/584/A96/tnoobs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/584/A96/tnoobs?GETtext/xml+votable180.050000true39.8284595833330128.729080.0055555555555555566/23 169 172 715 719 730-731 740 752-753 894 909 1228-1230 1571 2153 2162 2181 2232 6173 6210-6212 8847 8870 12529-12530 12680 17593 17625 17629 17849 17852 17880 17890 18476 18829 18835 18838 19034 19067 19141 19154 19921 20120 20303 20315 22383-22384 22392 23037 23121 23279 23380 23432 23449 23720 24125 24162-24163 24209 24876 24961 25052 25076 25582 26797 26808 26948 27141 27148-27149 27319 27338 28153 28155 28496 28498 29017 29190 29198 29219 29224-29225 29227 29309 29312 29393 29395-29396 29555 29558 29560 31109 31120 31276 36750 36760 42358 42396-42397 42415 42426 42460 42480-42481 42655 42752 42935 42975 42998 43834 43920-43921 44388 44390 44562 47090 48891 49059https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/584/A96?format=asciidefaultJ/A+A/584/A96/tnoobsTable of ground-based observations of TNOsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName or designation of the objectmeta.id;meta.maincharObsYear of observationtime.epochRAJ2000Topocentric ICRS right ascensiondegpos.eq.ra;meta.mainDEJ2000Topocentric ICRS declinationdegpos.eq.dec;meta.mainObsIDObservatory code (1)meta.id;instr.obstychar