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Contents. planet: 5 - Jupiter satellites: J18 - Themisto : 3 total number: 3 type: absolute dates: 2009-2009 observatory: 691 - Steward Observatory, Kitt Peak-Spacewatch Reference. MPC (Minor Planet Circular) 66686 Informations. relative to: absolute reference frame: astrometric centre of frame: topocentre epoch of equinox: J2000 time scale: UTC reduction: no information coordinates: absolute diff. refraction: no information receptor: CCD telescope: 0.9-m f/3 reflector observers: Observers J. V. Scotti, R. S. McMillan. data included in standard data file: no Comments. Format. 1. Number of satellite (N sat): 18 - J18 - Themisto 2. Year of the moment of observation 3. Month of the moment of observation 4. Day of the moment of observation with decimals 5. Hour of right ascension (alpha, h) 6. Minute of right ascension (alpha, m) 7. Second of right ascension (alpha, s) 8. Degree of declination (delta, deg) 9. Minute of declination (delta, ' ) 10. Second of declination (delta, '' ) 11. Code of observatory, N obs 12. Reference to publication ---------------------------------------------------------------------- N Year alpha delta N obs sat month day with Publ. decimals h m s deg ' '' ref. ----------------------------------------------------------------------