[FPSPACE] Parameters of the Iridium/Kosmos collision wanted

[John Locker]

Hi Erik

Unfortunately as the list was down much of last week a lot of   data  on the 
collision just didnt appear here.

As soon as the info was released I created this animation with up to date 
elements

http://i39.tinypic.com/2vbk75z.gif

You can see it was pretty much a side on impact.

To get the relevant numbers  you need to sign up to Space-Track and draw 
down historic data going back to before the 10th....then re run the 
tracking....

John




----- Original Message ----- 
From: "Erik Tronstad" <erik.tronstad at nilf.no>
To: <fpspace at friends-partners.org>
Sent: Saturday, February 21, 2009 10:44 AM
Subject: [FPSPACE] Parameters of the Iridium/Kosmos collision wanted


>
> Can anyone provide pre-collision orbital parameters for Iridium 33
> and Kosmos 2251? Perigeum, apogeum, inclination and orbital period
> are the parameters I would like to know.
>
> Aviation Week & Space Technology has a diagram on pages 20-21 in the
> Feb. 16, 2009 issue indicating a 90 degrees collision angle. Is this
> approximately correct? AW&ST also reports a relative velocity of 7
> mi/s (ca. 11,2 km/s) immediately prior to the collision. This abides
> well with a 90 degrees collision angle, supposing both objects had an
> orbital velocity around 8 km/s.
>
> Can anyone provide the launch date for the Iridium 33 satellite?
>
> Erik Tronstad
>
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