Re: Cerise collision

Bjoern Gimle (b_gimle@algonet.se)
Tue, 20 Aug 1996 23:41:22 +0200 (MET DST)

Walter Nissen wrote :
> 
>Has anyone identified the piece of debris (COSPAR ID or US SPACECOM 
>catalog number) which impacted?  And looked at its elsets? 

I reported in archive/latest/3198 :

>I obtained the current elset for each of the 1986-19 XX fragments listed
>in the June OIG SatSit report. 
> ... >
>The most interesting one appears to be #18208, having nearly the same
>Mean Motion, and making several close passes (around July 23-24):
>86019RF
>1 18208U 86019RF  96221.30560747 +.00001275 +00000-0 +23714-3 0 05727
>2 18208 098.4622 351.2184 0014567 082.7015 277.5846 14.66895566511576
>
Cerise  96205.392
1 23606U          96205.39273562  .00000083           23247-4 0  2127
2 23606  98.1025 141.7519 0008991  67.4104 292.8048 14.67264268 56023
Cerise  96207.165
1 23606U          96207.16580144  .00000078           22486-4 0  1959
2 23606  98.1027 143.5052 0008987  62.8166 297.3954 14.67264644 56281
> ....
>   Date    Local Time Norad           Name           Range (km)  EphAge
>
> 7/24/1996  8:09:49.7 18208 The latest set =              1.7    -14.97
> 7/24/1996  9:48:02.5 18208 The latest set =              2.0    -14.90
> 7/24/1996 11:26:15.4 18208 The latest set =              4.0    -14.83
> 7/23/1996 19:53:14.6 18208 The latest set =              4.3    -15.48
> .....
>Using the July 24 elset for Cerise, and only debris that could be within
>10 km vertically, I get :
> 7/24/1996  9:48:02.8 18208 The latest set =              1.3    -14.90
> .....
>

The Allen Thomson report that debris hit an extended boom agrees with
the elsets showing no velocity change on July 24. The gradual (?)
change seen July 27-29 in my charts at 
http://www.algonet.se/~b_gimle/gif/23606.gif could be when the
French stopped the spin caused by the hit.

Mike McCants has offered to search for elsets closer to 960724 in
his alldat.zip files.


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