Scrubbed owing to an issue with a telemetry transmitter on the launch vehicle. Testing to be undertaken in the Vehicle Integration Facility, new launch date to be advised. (source: ULAlaunch website.) Robert On 6 October 2017 at 22:06, Ted Molczan via Seesat-l <seesat-l_at_satobs.org> wrote: > NROL-52 is scheduled for launch on 2017 Oct 07 at 07:59 UTC, from Cape > Canaveral, aboard an Atlas V-421. > > Live coverage of the launch will be available here: > > https://spaceflightnow.com/2017/10/02/av075_journal/ > > The payload probably is the next GEO SDS (Satellite Data System) satellite. > > The last launch in the series was NROL-61 in July 2016, from Cape Canaveral > on an Atlas V-421. Its payload is known as USA 269 (16047A/ 41724). > > NROL-52's NOTAM co-ordinates are very close to those of NROL-61, which > suggests that it will follow a similar trajectory. > > Assuming launch at the above time, and a trajectory identical to that of > NROL-61, these would be the approximate initial orbits of payload and > Centaur: > > LEO parking orbit 190 X 1099 km > 1 76401U 76401A 17280.35143519 .00000000 00000-0 00000-0 0 08 > 2 76401 28.7000 325.4479 0647000 0.0000 179.9000 14.76550000 02 > > Payload 1108 X 35806 km > 1 76402U 76402A 17280.37777778 .00000000 00000-0 00000-0 0 02 > 2 76402 18.6773 325.4235 6985581 178.5185 21.1059 2.21873127 05 > > Centaur de-orbit -226 X 28051 km > 1 76403U 76403A 17280.37777792 .00000000 00000-0 00000-0 0 00 > 2 76403 18.8938 323.4266 6967986 166.7795 29.3374 3.00488254 09 > > The above elements are based on the TLEs I derived from early observations > of NROL-61 by Paul Camilleri and Scott Tilley: > > http://satobs.org/seesat/Jul-2016/0142.html > > The epoch of the payload and Centaur TLEs corresponds to the approximate > time of the Centaur's MES3 burn: about 09:04 UTC (MET 01h05m). > > The Centaur's re-entry impact zone is an approximately 160 x 600 km > rectangular region, centred near 12 N, 155 W - about 750 km south of Hawaii. > > 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-lReceived on Sat Oct 07 2017 - 01:06:36 UTC
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