Date: Wed, 13 Dec 2000 19:04:11 +0000 (GMT) From: John Rogers Subject: A bonus for the dual encounter: SEBn complex Hi all, This is to alert you to a stroke of good luck for Jupiter studies: the main complex of the SEBn/EZs disturbance, a unique highly structured wave that has existed for more than a year, may well be included in the hi-res targetting by Galileo and Cassini on Dec.29-30. The source and the most interesting structure of this disturbance is the main complex at its f. end, and by good fortune, this will be approaching the GRS on Dec.29-30. It should be alongside the turbulent sector of SEBZ f. the GRS, which Galileo will be targetting. I estimate that the f. end of the SEBn/EZs main complex will be 50-60 deg. f. the centre of the GRS on Dec.29/30. It will probably be still inconspicuous visually (although spacecraft images will no doubt show the flow patterns anyway), but still a major discontinuity in methane bands (it has not been included in any Cassini methane images so far released, so I look forward to seeing them). It will be wonderful if the three-dimensional structure and flow patterns of this disturbance can be revealed. Of course, ground-based images tracking it up to the encounter -- and in the New Year as it passes the GRS -- especially in the methane waveband -- will be valuable. Best wishes for Christmas and the Jupiter Millennium Encounter and 2001, John Rogers. ____________________________ John H. Rogers BAA Jupiter Section Director 10 The Woodlands Linton Cambs. CB1 6UF England At University of Cambridge: FAX: (01-223) 333840 E-mail: JR@mole.bio.cam.ac.uk ____________________________