Sorry, I made a mistake subtracting two simple numbers: The difference between 20:12:15 and 20:15:15 would be 3 minutes and not three! Thus my observation of the Lacrosse 5 disappearance was followed 3 minutes later by the disappearance observed by Oleinikoff followed by another disappearance 2 minutes after that. In response to Allen Thomson suggestion of simultaneous observations of this disappearance trick from different sites we did just that earlier this year. For instance on 26-MAR-07 such a Lacrosse 5 disappearance was observed simultaneously from two different places in England from my site in Germany. Of course there is no guarantee that the event on 14-AUG-07 would have been a genuine satellite effect or a local observer effect but I still find it interesting that there were three disappearances observed within just 7 minutes when during that time the position of the sun relative to the local satellite frame changed by just 6 degrees. Gerhard HOLTKAMP Darmstadt, Germany, On Thursday 18 October 2007 14:57, Gerhard HOLTKAMP wrote: > on 14-OCT-07 Oleinikoff Nikolay wrote about Lacrosse 5 disappearances: > >14 Aug 2007 > >In 20:14:53 - flare (? m.) > >And 20:15:14 - disappeared. > >In 20:17:03 - now re-appeared with flash +1.0 m. > >And 20:17:15 - disappeared. > >In 20:17:18 - now re-appearance +2.0 m. (+/-3s.) > > I just remembered having taken a few pictures of Lacrosse 5 at the time. > The first 15 sec exposure started at 20:11:44 UT, 14-AUG-07 and showed a > very bright (about mag 1.5) Lacrosse 5 trail. Shortly after the exposure > was finished the satellite quickly faded and I lost track of it in the > bright city sky of mine. But on a second photo I took at 20:12:37 UT it > showed up as a very weak trail at least 3 mag less than before. It must > have disappeared at about 20:12:15 UT. Checking with the times that > Oleinikoff Nikolay found (and assuming that this disappearance is intrinsic > to the satellite and doesn't depend on the observer) it would mean that it > dissappeared on that pass every two minutes. > > Gerhard HOLTKAMP > Darmstadt, Germany > 49.8822N, 8.6558E > > > ------------------------------------------------------------------------- > Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: > http://www.satobs.org/seesat/seesatindex.html ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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