Re: NROL-55 elements

From: Leo Barhorst via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 9 Oct 2015 11:12:50 +0200
Jon Mikel wrote: Maybe what Björn saw is the secondary payload adapter.

Jon, the secondary payload adapter is a boxlike structure attached to the
aft bulkhead
of the Centaur. It houses the PPOD´s from which the Cubsats were launched.
It remained attachted to the Centaur.

There are some video´s on www.NASA.gov/cubesats

Regards
Leo

2015-10-09 9:57 GMT+02:00 Jon . via Seesat-l <seesat-l_at_satobs.org>:

> 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 - 04:13:36 UTC

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