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  Astrometric observations of Helene (Veiga+, 2000)
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1.J/A+AS/143/405/table1Observed positions of Helene (22 rows)

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ShowSortColumn  Constraint Explain   (UCD)
  recno  Record number assigned by the VizieR team. Should Not be used for identification.
  Obs "Y:M:D" Year of the mean instant of observation
  X arcsec Differential topocentric coordinate, ΔRAcosDE (Note 1)   
  Y arcsec Differential topocentric coordinate, ΔDE (Note 1)   
  (O-C)X arcsec Observed minus calculated value of X
  (O-C)Y arcsec Observed minus calculated value of Y

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