Contents. planet: 5 - Jupiter satellites: J1-Io: 124 J2-Europa: 113 J3-Ganymedes:112 J4-Callisto: 47 total number: 198 type: relative dates: 1985 observatory: Barc = Barcelona, Spain Brzl = Itajuba, Brazil Catn = Catania, Italy CTIO = Cerro Tololo Inter-american Observatory, La Serena, Chile CI = Canarian Islands, Spain DS = Laurel, Md, USA ESO = European Southern Observatory, La Silla, Chile KPNO = Kitt Peak National Observatory, Tucson, AZ, USA J/R = Running Springs, CA, USA JW = Lunar and planetary observers, USA Low'l= Lowell Observatory, Flagstaff, AZ, USA M Kea= Mauna Kea, USA Mt L = Mt Laguna, CA, USA Nice = Nice, France Oak R= Oak Ridge Station, Harvard, Mass., USA OHP = Observatoire de Haute Provence, Forcalquier, France Perth= Perth Observatory, Bickley, Western Australia Rowe = Christchurch, New Zealand Stwd = Tucson, AZ, USA Sd Sp= Siding Spring Observatory, Australia SAAO = South African Astronomical Observatory, Sutherland, South Africa TL = San Bruno, CA, USA Tokyo= Mitaka Shi, Tokyo, Japon WA = Adams Lane Observatory, Blenheim, New Zealand Reference. GSO: 1991, An analysis of the 1985 observations of mutual phenomena of the Galilean satellites, AJ 102-2,806 1991 AJ 102 806 Informations. relative to: other satellite reference frame: astrometric centre of frame: geocentre or heliocentre epoch of equinox: B1950 time scale: UTC reduction: no information coordinates: differential diff. refraction: no information receptor: CCD | photoelectric telescope: numerous telescopes used observers: GSO (Galilean satellites observers) data included in standard data file: no Comments. This paper presents relative positions of the Galilean satellites by pair extracted from the observation of mutual events Format. by column: Site of observation/UTC date in 1985 (month/day/hour/minute/second)/ DT/DX/DZ/Dacosd/Dd/phi1/phi2/weighting