Content asteroid: 2003 QY90 satellites: companion total number: 15 type: position dates: 2003-2005 observatory: 304 - Las Campanas Observatory, Chile Reference. S.D. Kern, J.L. Elliot. Discovery and characteristics of the Kuiper belt binary 2003QY90. Icarus. 2006. V. 183. P. 179–185. 2006Icar..183..179K Informations. relative to: the primary reference frame: astrometric ICRF centre of frame: topocentric epoch of equinox: J2000 time scale: UTC reduction: no information coordinates: X, Y - secondary relative to primary diff. refraction: no information receptor: telescope: Magellan telescopes, the Clay 6.5-m telescope at Las Campanas Observatory Comments. Format 1. Year of the moment of observation 2. Month of the moment of observation 3. Day of the moment of observation 4. JD- time of the observations in JD with decimals 5. X - relative right ascension, arcsec 6. SigX - the error of X, arcsec 7. Y - relative declination, arcsec 8. SigY - the error of Y, arcsec 9. dm - the delta magnitude of the components 10. Sig dm - magnitude errors dm ---------------------------------------------------------------------- Year Day JD X SigX Y SigY dm sigdm Month arcsec arcsec ----------------------------------------------------------------------