J/AJ/161/237ivo://CDS.VizieR/J/AJ/161/237doi:10.26093/cds/vizier.51610237CDSZhang H.Y.Qiao R.C.Yu Y.Yan D.Tang K.2022-01-19T13:29:00Z2021-09-07T12:52:39ZCDS support team

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

cds-question@unistra.frasteroidssolar-systemastrometryvisible-astronomyinfrared-astronomyThe large time span and precise observational data of natural satellites is of great significance for updating their ephemerides and studying their dynamic characteristics. With the help of the new image-processing methods and the Gaia DR2 catalog, all CCD images of Triton taken with the 1.56m telescope of Shanghai Astronomical Observatory during 2005-2009 were reanalyzed. The median filtering algorithm is used for image preprocessing to remove the influence of the halo of Neptune, and an upgraded modified moment, called the intensity-square-weighted centroiding method, is applied to determine the centroids of the stars and Triton. A total of 2299 positions of Triton were obtained, including 263 new observed positions and 2036 updated observed positions. Such five-year time span data with high precision will be very helpful to improve the orbit parameters of Triton.2021AJ....161..237Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/237CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/120/107 : 1989-1994 CCD observations of Triton (Veiga+ 1996)J/A+AS/131/291 : 1995-1997 CCD positions of Triton (Veiga+ 1998)J/AJ/119/936 : Triton stellar occultation candidates (McDonald+, 2000)J/A+A/425/1107 : Observations of Triton and Proteus (Vieira Martins+, 2004)J/MNRAS/376/1707 : 1996-2006 observations of Triton (Qiao+, 2007)J/A+A/617/L5 : Water delivery in Pluto & Triton atmospheres (Poppe+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/237https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/237http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/237https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/237https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/237http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/237GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/237/table2 (Observed positions of Triton)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/237/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/237/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/237/table2?GETtext/xml+votable180.050000true317.898085556-16.3555813890.0055555555555555566/48574-48575 48603 48611 48613-48614 48616-48617 48912https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/237?format=asciiOpticalInfrareddefaultJ/AJ/161/237/table2Observed positions of TritonSite[337] IAU observatory code (1)meta.code;instr.obstyintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs[2005/2009] Observation date, Year, UTCtime.epoch;obsRA_ICRS[21] Hour of Right Ascension (ICRS)pos.eq.ra;meta.mainDE_ICRS[13/16] Degree of Declination (ICRS)pos.eq.dec;meta.main