I wrote: > Visual observers in and near North America's eastern time > zone may be able to observe the Centaur's propellant dump Assuming launch on-time, the *very* approximate line of demarcation runs through Winnipeg, Kansas City, Tulsa and New Orleans, which would be just inside the zone of visibility, i.e. pass occurs soon after local sunset. Observers anywhere east (perhaps even a bit west) of that line are in the zone of visibility. I do not know the duration of the launch window, but I suspect it to be at least about 30 minutes. A launch later in the window would extend the zone of visibility westward. Ted Molczan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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