Content asteroid: (90482)Orcus satellites: companion total number: 1 type: position dates: 2005-2005 observatory: 250 - Hubble Space Telescope Reference. Brown M. E., Suer T.-A. Satellites of 2003 AZ_84, (50000), (55637), and (90482). IAU Circ., No. 8812, #1 (2007). 2007IAUC.8812....1B Informations. relative to: the primary reference frame: astrometric ICRF centre of frame: topocentric epoch of equinox: J2000 time scale: UTC reduction: no information coordinates: separation - s, pos. angle - p (secondary relative to the primary) diff. refraction: no information receptor: CCD HST telescope: High Resolution Camera (+ F606W filter) Comments. Format. 1. Year of the moment of observation 2. Month of the moment of observation 3. Day of the moment of observation with decimals 4. s -separation, arcsec 5. Sig s - the error of s , arcsec 6. p - position angle, degree 7. Sig p - the error of p , degree ------------------------------------------- Year Day s Sig s p Sig p Month arcsec arcsec deg deg -------------------------------------------