Marco Langbroek wrote as reaction to: 2006/7/31, Marco Langbroek <marco.langbroek@wanadoo.nl>: > > Also if the YVV/33 degree theory is correct Marco has a chance to observe flares in the next few days > > > > Flare Results for Observer Lat=52.15412 Long=4.49081 > > Satellite NORAD 28646 > > Flare Results for Flight Mode YVV Panel Angle 33° > > 12. SAR MA 2.97104043228698 at 31/07/2006 21:51:22 Alt=74.2391395227923 > > Phil a.o., > > It did not flare, but disappeared again instead.... > > I picked Lacrosse 5 (05-016A) up at about 21:50:00 UTC near Bootes/CrB. It was > mag. +2.5 brightening to +2.0 in the next half minute or so. > > Somewhere around 21:50:45 I started to look at my clock to trigger the camera > countdown at 21:51:07 UTC. When I looked up again at 21:51:09 or so, it already > was gone. It did not re-appear. > > The photograph (21:51:18.1 to 21:51:28.8 UTC) shows no trail at all, meaning > that at that time it must have been fainter than +3.5. Would it have been as > bright as it was a 21:50:00 to 21:50:45 it would be visible on the image, and > certainly if it subsequently would have flared. > > There was some thin cirrus in the sky, but the area where it should have flared > was clear and faint stars are visible on the image. > > - Marco > Triggered by the very interesting conversation about the Lacrosse 5 disappearance trick I follwed this very satellite from my location. I timed when L5 disapperead. It was at UT 21:50:56.4 (with about 0.5 sec accuracy) from my location at COSPAR 4160 51° 16' 45.5" N 5° 28' 36.6" E (WGS84) 35 m If these timings are of any interest to other people, I am willing to report them via this list. I replayed L5's track across the sky using Guide 8 to find its azimuth and Sun's azimuth. These values are 294° and 332° repectively. My L5 brightness estimate was +2.8 when it passed Izar (eps Boo). Bram Dorreman ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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