The launch of Wideband Global SATCOM (WGS 7) from Cape Canaveral on a Delta 4 Medium+(5,4), has been delayed to 2015 Jul 24, between 00:07 and 00:46 UTC. http://spaceflightnow.com/2015/07/21/d372-journal/ I offer the following rough TLE of the orbit after the final burn of the 2nd stage, assuming launch at window-open: SECO-2 441 X 66870 km 1 78903U 15205.02680557 .00000000 00000-0 00000-0 0 06 2 78903 24.0048 122.2621 8296700 177.8402 1.4113 1.08404000 01 Following spacecraft separation, observers within range should look for the following 2nd stage events (times approximate): T+ UTC 00:45:00 00:52:00 CCAM Start (Collision and Contamination Avoidance Manoeuvre) 00:47:20 00:54:20 CCAM End 00:54:41 01:01:41 H2 Depletion End 00:56:40 01:03:40 O2 Depletion End 01:18:33 01:25:33 N2H4 depletion End The fuel dump could produce a spectacular comet-like phenomenon, similar to that of WGS 4 in 2012, imaged despite challenging conditions, by Willie Koorts: http://satobs.org/seesat/Jan-2012/0270.html Ted Molczan _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Wed Jul 22 2015 - 13:02:14 UTC
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