Content asteroid: (87)Sylvia satellites: 1 - Remus: 25 2 - Romulus: 67 total number: 92 type: position dates: 2001-2013 observatory: 250 - HST 568 - Mauna Kea (Keck observatory, Gemini observatory) 309 - Cerro Paranal (ESO, Chile) Reference J. Berthier, F. Vachier, F. Marchis, J. Durech, B. Carry. Physical and dynamical properties of the main belt triple Asteroid (87) Sylvia. Icarus. 2014. V. 239. P. 118–130. 2014Icar..239..118B Informations. relative to: primary reference frame: astrometric ICRF centre of frame: topocentre epoch of equinox: J2000 time scale: UTC reduction: not available coordinates: Xo, Yo (secondary relative to primary) receptor: CCD telescopes: 1 - Keck/NIRC2 2 - HST/WFPC2 3 - VLT/NACO 4 - Gemini/NIRI 5 - VLT/SINFONI 6 - VLT/NCAO Comment: no Format 1. Year of the moment of observation 2. Month of the moment of observation 3. Day of the moment of observation 4. Hour of the moment of observation 5. Minute of the moment of observation 6. Second of the moment of observation 7. Nsat - number of satellite 8. Xo - observed X (arcsec) 9. Yo - observed Y (arcsec) 10. Xc - computed X (arcsec) 11. Yc - computed Y (arcsec) 12. X(o-c) - observed minus computed X 13. Y(o-c) - observed minus computed Y 14. sigma - uncertainty of astrometric positions (mas) 15. Ntel - number of telescope 16. Code - Code of observatory ---------------------------------------------------------------------------------------------------- Year h Nsat Xo Yo Xc Yc X(o-c) Y(o-c) sigma Ntel Code Month m arcsec arcsec arcsec arcsec arcsec arcsec mas Day s ----------------------------------------------------------------------------------------------------