(no subject)

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 14 Mar 2016 19:40:51 +0100
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
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Received on Mon Mar 14 2016 - 13:41:44 UTC

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