Contents. planet: 7 - Uranus satellites: U1-Ariel : 108, U2-Umbriel: 103, U3-Titania: 66, U4-Oberon: 64, U5-Miranda: 104, total number: 445 type: relative dates: 1985-1986 observatory: Voyager 2 spacecraft centered positions Reference. Jacobson R. A. (1992) Astrographic observations of the major Uranian satellites from Voyager 2 Astronomy and Astrophysics Supplement Series, vol. 96, pp. 549-563 1992A%26AS___96__549J Informations. relative to: absolute reference frame: FK4 centre of frame: Voyager 2 spacecraft centered positions epoch of equinox: B1950 time scale: UTC reduction: no information coordinates: right ascension and declination diff. refraction: n.a. receptor: CCD 800x800 telescope: Voyager narrow angle camera observers: JPL data included in standard data file: no Comments. no Format. 1. SAT-NB, Satellite number (1=Ariel; 2=Umbriel; 3=Titania; 4=Oberon; 5=Miranda) 2. Voyager Picture Identification (PICNO) 3. observation time (time of the center of the exposure) in Julian Ephemeris Date (JED) 4. Voyager centered astrographic right ascension (RA) of the satellite in the FK4/B1950 system in degrees corrected for stellar aberration 5. Voyager centered astrographic declination (DEC) of the satellite in the FK4/B1950 system in degrees corrected for stellar aberration 6. uRA, uncertainty associated to RA with units of degrees 7. uDEC, uncertainty associated to DEC with units of degrees 8. Voyager Picture Identification (PICNO) 9. Tau, light travel time from the satellite to the spacecraft in units of seconds 10, 11, 12. the modified Uranus barycentric position X, Y, Z of the spacecraft at the observation time in FK4/B1950 coordinates with units of km 13. RAa, right ascension of the unit vector along the approach trajectory asymptote in the FK4/B1950 system with units of degrees 14. DECa, declination of the unit vector along the approach trajectory asymptote in the FK4/B1950 system with units of degrees ---------------------------------------------------------------------------------------------------------------------------------------------------- SAT-NB PICNO JED RA DEC uRA uDEC PICNO Tau X Y Z RAa DECa ----------------------------------------------------------------------------------------------------------------------------------------------------