Re: Iridium 85

Tristan Cools (
Sun, 17 Oct 1999 13:15:47 +0100

At 03:38 16/10/99 -0500, you wrote:

>Thursday evening local (early 15 October UTC) I observed 
>Iridium 85 (98-66C, 25529).  Its flashing was very 
>complex, and I had a difficult time making much sense of 
>the times (from 0.13 to 6.23 seconds, with several of 
>four or five seconds).  The best I could come up with to 
>fit the times I had was a period of possibly about 10.7 

Yesterday(16th) I predicted(with Iridflar) a mag -7 flare from this sat not
seeing that it was a failed Iridium, so I saw no flare.  but I stayed on
watching and saw the flashes from this sat in a more southerly direction
with naked eye.  The primary flashes were very bright with many secundary
flashes but because of the difference of brightness between primary and
secundary flashes it was easy to mearsure.

These are the time difference between primary flashes:


This gives a mean period of 5.31s which is very precise I think.


Tristan Cools
Belgian Working Group Satellites(BWGS)

Damse Vaart: 3.2478E/51.2277N
Ryckevelde:  3.2856E/51.2045N
Brugge:      3.2166E/51.2104N

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