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If you have the Astronomy 2014 handbook, it lists all the Jupiter events (and much more) for the year in extensive detail (page 112 onwards).
There'll be a slight difference in times (as listed) depending on where you are with respect to the benchmark for the Eastern or Western timezones, but you should be able to calculate that and then have a minute-accurate reference to compare to (the EST time they give is "mean solar time on the meridian of 150 deg E. longitude", while WST is taken at 120 deg E).
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