RE: flaring geoasat seen

From: Ed Cannon (
Date: Sun Oct 14 2012 - 04:31:15 UTC

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    Kevin replied to Derek:
    > --- On Sat, 10/13/12, Derek C Breit <> wrote:
    >> How many geosats are spin stabilized??
    > The only one's left in geo orbit.
    > One's we can see.
    > Brazilsat B3 ( 25152 )
    > Brazilsat B4 ( 26496 )
    Derek, from California you should be able to see the DSP that's out 
    over the Pacific.  I'm pretty sure that it's 21805, 91-80B, which 
    replaced the one that used to be there.  It flashes to +7 here 
    around 4:00 UT and sometimes brightens again to some extent about 
    30 minutes later.  It is spin-stabilized at 6 rpm and has four solar 
    panels and so flashes every 2.5 seconds.  On exceptional moonless 
    nights I have been able to see it from BCRC with my 8x42 binoculars, 
    but usually if I can see it at all it takes the 12x60s.  Of course
    positional observations would be welcomed.
    Ed Cannon - Austin, Texas, USA
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