After yesterday's scrub, NROL-108 is now re-slated for 19 Dec 2020. The launch window runs from 14:00 to 17:00 UT. Here are two estimated elset variants for the start of the time window, one for a ~52 degree orbital inclination, the other for a ~50 degree orbital inclination: NROL-108 52 deg for launch at 2020 Dec 19 14:00:00 UT 1 70000U 20999A 20354.58333333 .00000000 00000-0 00000-0 0 04 2 70000 051.9500 194.5181 0003690 047.9580 324.6522 15.56602223 05 NROL-108 50 deg for launch at 2020 Dec 19 14:00:00 UT 1 70001U 20999A 20354.58333333 .00000000 00000-0 00000-0 0 05 2 70001 050.0000 192.5775 0003690 049.1295 324.6522 15.56602223 05 The same elsets, but re-epoched for launch at the end of the time window: NROL-108 52 deg for launch at 2020 Dec 19 17:00:00 UT 1 70003U 20999A 20354.70833333 .00000000 00000-0 00000-0 0 06 2 70003 051.9500 239.6413 0003690 047.9580 324.6522 15.56602223 07 NROL-108 50 deg for launch at 2020 Dec 19 17:00:00 UT 1 70004U 20999A 20354.70833333 .00000000 00000-0 00000-0 0 07 2 70004 050.0000 237.7007 0003690 049.1295 324.6522 15.56602223 08 The orbital plane of USA 276 passes over the launch site at 16:13 UT on 19 December. If (speculation!) NROL-108 targets that plane, launch will be around 16:05 UT: NROL-108 52 deg for launch at 2020 Dec 19 16:05:00 UT 1 70005U 20999A 20354.67013889 .00000000 00000-0 00000-0 0 00 2 70005 051.9500 225.8537 0003690 047.9580 324.6522 15.56602223 03 NROL-108 50 deg for launch at 2020 Dec 19 16:05:00 UT 1 70006U 20999A 20354.67013889 .00000000 00000-0 00000-0 0 01 2 70006 050.0000 223.9131 0003690 049.1295 324.6522 15.56602223 05 For backgrounds to NROL-108, see my initial post here: http://www.satobs.org/seesat/Dec-2020/0073.html Elsets can be easily re-epoched to match the eventual actual launch time using my 'TLEfromProxy' software: http://software.langbroek.org - Marco ----- Dr Marco Langbroek - SatTrackCam Leiden, the Netherlands. e-mail: sattrackcam_at_langbroek.org Cospar 4353 (Leiden): 52.15412 N, 4.49081 E (WGS84), +0 m ASL Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL Station (b)log: http://sattrackcam.blogspot.com Twitter: _at_Marco_Langbroek ----- _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Fri Dec 18 2020 - 06:20:00 UTC
This archive was generated by hypermail 2.4.0 : Fri Dec 18 2020 - 12:20:00 UTC