An object [41390/16017C] from the ExoMars launch has been catalogued in the transfer orbit; 697x21088km _at_ 51.6deg. This could be the APT (Auxiliary Propellant Tank), or the Briz-M with ExoMars. Using this orbit, and allowing for some range in the argument of perigee, I've taken the position and velocity around the 4th Briz-M burn at 19:54UT, and increased the velocity vector by a factor 1.1. This increases the apogee to about 173000 km (e=0.93) and should be representative for the escape orbit for the first 6 hours or so after the escape burn. The resulting elsets are below. The 99005 elset is closest to the JSpOC elset of object 41390 and should be used as a reference. The other elsets are to indicate the possible offsets in position and time. There is some uncertainty in the timing, mainly because I apply the velocity instantly, whereas in reality the burn takes several minutes. On top of that there is the uncertainty in whether object 41390 is the payload or the APT. Observers in Europe will have good visibility shortly after the escape burn. Observers in Africa will be able to track the probe quite a way out. Regards, Cees 1 99000U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 06 2 99000 51.5921 322.7904 9266574 89.7355 359.0806 0.30343002 02 1 99001U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 07 2 99001 51.6219 322.7970 9268417 91.7169 359.1409 0.30358388 04 1 99002U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 08 2 99002 51.6513 322.8065 9270144 93.6955 359.2056 0.30372495 06 1 99003U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 09 2 99003 51.6800 322.8188 9271740 95.6714 359.2744 0.30385852 05 1 99004U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 00 2 99004 51.7080 322.8339 9273200 97.6449 359.3469 0.30398115 06 1 99005U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 01 2 99005 51.7350 322.8516 9274525 99.6159 359.4228 0.30409108 04 1 99006U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 02 2 99006 51.7609 322.8719 9275706 101.5848 359.5017 0.30418758 05 1 99007U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 03 2 99007 51.7855 322.8947 9276737 103.5514 359.5833 0.30427313 02 1 99008U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 04 2 99008 51.8088 322.9199 9277616 105.5162 359.6671 0.30434519 07 1 99009U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 05 2 99009 51.8306 322.9473 9278335 107.4791 359.7529 0.30440638 06 1 99010U 14999A 16074.82916667 .00000000 00000-0 00000-0 0 07 2 99010 51.8507 322.9768 9278900 109.4404 359.8401 0.30445172 07 _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-lReceived on Mon Mar 14 2016 - 13:41:44 UTC
This archive was generated by hypermail 2.3.0 : Mon Mar 14 2016 - 18:41:44 UTC