Any change to the Northern Hemisphere visibility window?? Derek -----Original Message----- From: seesat-l-bounces+breit_ideas=poyntsource.com@satobs.org [mailto:seesat-l-bounces+breit_ideas=poyntsource.com@satobs.org] On Behalf Of Ted Molczan Sent: Saturday, March 05, 2011 10:14 AM To: seesat-l@satobs.org Subject: RE: X-37B OTV 2-1 search elements X-37B OTV 2-1 is scheduled for launch from Cape Canaveral on an Atlas V-501, today, 2011 Mar 05, during 10 minute windows beginning at 21:09 UTC, and ~22:46 UTC. I am following up on Bob Christy's observation that the 97 min interval between the windows could be the orbital period of another satellite involved somehow in the launch, perhaps one of the KeyHoles. The 18-19 min/d later arrival of the windows also is consistent with the involvement of another satellite, with period near 97 min. I have identified a number of potential classified and unclassified satellites with period near 97 min, and am looking for meaningful conjunctions. I will report my findings when complete. The following search elements are based on the initial orbit of OTV 1-1, at the opening of today's windows. T0=21:09 400 X 423 km 1 70406U 11064.92885959 .00000000 00000-0 00000-0 0 07 2 70406 39.9849 267.8099 0016616 341.1195 18.8998 15.52662485 03 T0=22:46 400 X 423 km 1 70407U 11064.99622070 .00000000 00000-0 00000-0 0 08 2 70407 39.9849 292.1263 0016616 341.1195 18.8998 15.52662485 08 I am reasonably confident of the inclination, less so of the altitude. The OTV's standard visual magnitude is 4.2 (1000 km range, 90 deg phase angle). Ted Molczan _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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