Re: Satellite Collision

From: Till Potinius via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 7 Jan 2017 12:37:49 +0100
Celestrak lists this one: 


OPS 4412 (00801) - NOAA 16 DEB (41428 with 1km Min Range at 2017 Jan 07 21:53:54.734. 


This fits the data, but not the entire statement from JSpOC:
The JSpOC has identified a close approach between two non-maneuverable satellites in a sun-synchronous orbit (approximately 800km altitude) with a time of closest approach at 21:53:00 UTC (16:53 EST) on 7 January 2017. The probability of collision has been predicted as high as 44%. Affected operators have been notified.


OPS 4412 is definitely a non-maneuverable satellite, the other piece is just some space debris.
However, the „affected operators“ could be the operators of the approaching satellites or operators of other satellites in similar orbits.

1km minimum range in TLE can result in such a probability with the much better data at JSpOC.


Till


> Am 07.01.2017 um 12:13 schrieb Kevin Fetter via Seesat-l <seesat-l_at_satobs.org>:
> 
> Using STK to see, what one's were predicted to have a close encounter, I had got the result of the following one's
> 
> OPS 3367 A = 00734
> 
> DMSP 5D-2 F9 (USA 29)  = 18822
> 
> STK shows a result, of the 2 satellites passing within 16 km of each other, at 21:49:44 utc ( Jan 7 )
> 
> Kevin
> 
> --------------------------------------------
> On Fri, 1/6/17, DAVID DICKINSON via Seesat-l <seesat-l_at_satobs.org> wrote:
> 
> Subject: Satellite Collision
> To: "Seesat List" <seesat-l_at_satobs.org>
> Received: Friday, January 6, 2017, 6:23 PM
> 
> Dear Gang,
> Space-Track/JSpOC is currently listing a possibility (44%)
> of an collision between two unnamed satellites in
> sun-synchronous orbit tomorrow at ~21:53... anyone have any
> idea which two satellites are involved?
> Thanks,  Dave Dickinson Blog: www.astroguyz.com Twitter:
> http://twitter.com/Astroguyz Youtube: http://www.youtube.com/astroguyz
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Received on Sat Jan 07 2017 - 05:38:13 UTC

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