[amsat-bb] Delfi-C3 Close approach warning

wouter weggelaar pa3weg at amsat.org
Tue Mar 30 00:59:47 PDT 2010

Hi All,

While Delfi-C3 is rapidly approaching her second birthday on 28th of
April, the team got a warning from The United States Joint Space
Operations Center about a close approach of COSMOS debris and
Today at 14:49 UTC the two objects will approach each other almost
heads on with a difference velocity of 15km/s (yes, kilometers a
second!). Fortunately, the predicted distance between the objects will
be 492m, so they will miss each other.
Although these close approach warnings were given to other satellites
as well, and the chance that something really happens is very small,
we would like to encourage people to listen for Delfi-C3 and send in
Please have a look at the mission operations page at
for frequency info and the latest RASCAL downoad.

**PLEASE NOTE** Due to Delfi-C3s habit of sometimes switching off from
science mode, you might hear nothing while Delfi-C3 is fine. Don't
panic! but please do listen the orbits after and post your findings on

Thanks on behalf of the Delfi-C3 team,

Wouter Weggelaar
Delfi-C3 Mission Operations

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