Hi Ed, the object was 66040B, a Thor-Agena B rocket for Nimbus 2. As it passed USA 186, it was at 1113 km height, vs 758 km for USA 186. You see the moment of passing (03:08:53) and speed diff from timetags and tick marks in 030853.bmp. I zoomed to a 8' field and found the predicted track separation = 1'59" (sic). Ed080611.bmp was the initial search for "all" objects closer than 3333 km in a wide field. HD189037.bmp is a better approach - in the same field, but only the objects within 4 deg from HD189037 on the tracks at az=42 deg. The "HD" search found (within 5555 km range): Cat # Satellite Name ----- -------------- 31380 FENGYUN 1C DEB 27600 MICRO LABSAT 10412 COSMOS 839 DEB 28888 USA 186 02174 THOR AGENA B R/B 30353 FENGYUN 1C DEB 21819 INTERCOSMOS 25 /Björn ----- Original Message ----- From: "Ed Cannon" <edcannonsat@yahoo.com> To: <seesat-l@satobs.org> Sent: Wednesday, June 11, 2008 9:32 PM Subject: very close encounter between two satellites > Last night USA 186 (05-042A, 28888) caught up to and > passed another object going the same direction. With > my binoculars I could not see any separation between > them at the moment they passed. I don't have the data > and don't know what the other object was, but this > occurred on the first pass, with both of them low in > our northeast around 3:07-08 UTC. We were at BCRC. ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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