NROL-55 elements

From: Jon . via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 9 Oct 2015 09:57:04 +0200
Hi All;

Congratulations to all people who observed NROL-55.

Here my guess:

NOSS 3-7 leader                                        1019 X 1193 km
1 79703U 15281A   15282.17602200 0.00000000  00000-0  00000+0 0    01
2 79703  63.3883 291.1305 0115824 182.5402 177.5048 13.40452178    00

Total rms: 0.04


NOSS 3-7 trailer                                       1013 X 1200 km
1 79701U 15281C   15282.17605996 0.00000000  00000-0  00000+0 0    04
2 79701  63.4244 291.1930 0125089 179.9904 180.1144 13.40324538    00

Total rms: 0.04

Procedure was:
Used Ted's brilliant estimation and I've adapted RAAN and epoch to match
the 30 seconds difference of time and RAAN deviation due to the delay at
launch, and then fitted all observations made by Björn, Leo and Alberto.

As Leo, used 79701 for the trailer and 79703 for the leader.

I am not able to derive any orbit of the Centaur yet using Björn's obs.
Interesting that Björn saw 2 objects instead only the Centaur.
There are 13 cubesats in orbit on this launch, probably all of them too
small to be seen. More information about the secondary payloads can be
found here:

http://spaceflight101.com/atlas-v-nrol-55/nrol-55-secondary-payloads/

Maybe what Björn saw is the secondary payload adapter.



Jon.

-- 
Jon, COSPAR 6242, 42.9453, -2.82839, 623m, Bitoriano, Basque Country.
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Received on Fri Oct 09 2015 - 02:57:34 UTC

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