Re: Pinpoint flashes (fwd)

Jim Varney (
Wed, 17 Jul 1996 19:06:41 -0700

Larry Klaes asked:

>Wasn't Cosmos 1900 one of those Soviet nuclear-powered sats that did not
>eject its nuclear core into a higher orbit as planned and threatened to
>fall on Earth around 1990?  Or have I got the wrong number?

Yes.  Cosmos 1900 stopped responding to radio commands in April, 1988.  
It was very close to reentry when the entire satellite,
not just the reactor, was boosted to a higher orbit.

Also see SeeSat message 1545: an interesting account of how SeeSat observers
detected problem with other Cosmos satellites with radioactive cores.

 -- Jim