Re: FW: Forced reentry of Cosmos 2495

From: Jonathan McDowell via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 9 Sep 2014 10:58:30 -0400
Although not quite the normal recovery zone, there was a southbound pass
over Russia at 0330 UTC.
Maybe a recovery attempt on that pass went awry?

On 9 September 2014 10:41, Marco Langbroek via Seesat-l <seesat-l_at_satobs.org
> wrote:

> Björn Gimle via Seesat-l schreef op 8-9-2014 22:54:
>
>> Rob Matson sent me the following info, of which I was not aware otherwise:
>>
> >
>
>>  A little surprising to me that the Russians would
>> command destructive reentry to occur over land rather than ocean –
>> especially over CONUS – when some pieces of the 6.7-ton satellite will
>> likely survive to the ground.
>>
>
>
> On the last available pre-reentry orbit it would become visible over the
> US at about 4:32 UT (Sep 3 UT), at 235 km altitude.
>
> Thomas photographed it, obviously much lower in altitude, between 4:31 and
> 4:33 UT, so only a small time discrepancy of a few minutes max.
>
> The relatively minor discrepancy between observed pass time during reentry
> and predicted pass time based on pre- re-entry elements, suggest that the
> satellite orbit was lowered rather suddenly and drastically very shortly
> before the pass over the US started.
>
> Going from Thomas' observation times when it passed over New Mexico, this
> reentry happened some 5 minutes after the satellite passed its descending
> node at 4:27 UT. So I wonder whether for example an intended orbital plane
> change (which you normally do by firing a booster in one of the nodes) went
> wrong and it was sent plummeting down instead. I hardly can't believe the
> Russians wanted this one to come down over the USA.
>
> - 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 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
> Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
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> -----
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Received on Tue Sep 09 2014 - 09:59:10 UTC

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