Content asteroid: 2003 QY90 satellites: companion total number: 12 type: position dates: 2003-2009 observatory: 250 - Hubble Space Telescope 304 - Las Campanas, Chile Reference. W.M. Grundy, K.S. Noll, F. Nimmoc, H.G. Roe, M.W. Buie, S.B. Porter, S.D. Benecchi, D.C. Stephens, H.F. Levison, J.A. Stansberry Five new and three improved mutual orbits of transneptunian binaries. Icarus. 2011. V. 213. P. 678–692. 2011Icar..213..678G 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 (see in publications) receptor: telescope: 1 - Magellan Instant Camera (MagIC) on the Baade, Clay 6.5 m telescopes 2 - ACS 3 - WFPC2 Comments. Number of telescope 1 - as described in the paper: Kern, S.D., Elliot, J.L., 2006. Discovery and characteristics of the Kuiper belt binary 2003 QY90. Icarus 183, 179–185. Format. 1. Year of the moment of observation 2. Month of the moment of observation 3. Day of the moment of observation 4. h - hour of the moment of observation with decimals 5. Ntel -number of telescope, 6. r - the distance from the Sun to the target, au 7. R - the distance from the observer to the target, au 8. g - the solar phase angle, degrees 9. X (secondary relative to primary), arcsec 10. SigX - the error of X , arcsec 11. Y (secondary relative to primary), arcsec 12. SigY - the error of Y , arcsec 13. Vprim - visual magnitude for primary body, -99.9 if value is not given 14. sigVp - estimated uncertainties of Vprim, 0.0 if value is not given 15. Vsec - visual magnitude for secondary body, -99.9 if value is not given 16. SigVs - estimated uncertainties of Vsec, 0.0 if value is not given 17. Nobs- code of observatory ------------------------------------------------------------------------------------------------------------------------ Year Day h Ntel r R g X SigX Y SigY Vprim SigVp Vsec SigVs Nobs Month au au deg arcsec arcsec arcsec arcsec ------------------------------------------------------------------------------------------------------------------------