Content asteroid: (65489)Ceto satellite: Phorcys total number: 5 type: position dates: 2006-2006 observatory: 250 - Hubble Space Telescope (HST) Reference W.M. Grundy, J.A. Stansberry, K.S. Noll, D.C. Stephens, D.E. Trilling, S.D. Kern, J.R. Spencer, D.P. Cruikshank, H.F. Levison. 2007 The orbit, mass, size, albedo, and density of (65489) Ceto/Phorcys: A tidally-evolved binary Centaur. Icarus. 2007. V. 191. P. 286–297. 2007Icar..191..286G Informations. relative to: primary reference frame: astrometric ICRF centre of frame: topocentre epoch of equinox: J2000 time scale: UTC reduction: not available coordinates: r, R, g, X, Y (secondary relative to primary) receptor: CCD telescope: HST HRC/ACS (High-Resolution Camera of the Advanced Camera for Surveys) 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 with decimals 5. r(AU) - the distance from the Sun to the target 6. R(AU) - the distance from the observer to the target 7. g(deg) - the phase angle, the angular separation between the observer and Sun as seen from the target 8. X(arcsec) - relative right ascension. 9. sigma(X)(arcsec) - 1-sigma uncertainties X 10. Y(arcsec) - relative declination 11. sigma(Y)(arcsec) - 1-sigma uncertainties Y ---------------------------------------------------------------------------------- Year Day Hour r R g X sigma(X) Y sigma(Y) Month AU AU deg arcsec arcsec arcsec arcsec ----------------------------------------------------------------------------------