Helios 1B flashing

From: Ted Molczan (seesat@rogers.com)
Date: Tue Jul 19 2005 - 04:39:11 EDT

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    Last month, Ed Light reported 'bright "flashing/flaring"' of Helios 1B (99064A /
    This morning, I happened to spot it as unknown in between clouds. It culminated
    on 2005 Jul 19 at 07:56:46 UTC, elevation 53 deg, azimuth 288 deg,
    It was faint at minima, but its maxima were more like flares, to about mag zero.
    I estimate that its flash period was between 10 and 20 s.
    Helios 1B was manoeuvred from its operational sun-synchronous altitude to its
    present 600+ km graveyard orbit in the fall of 2004, after its on-board
    batteries failed.
    Ted Molczan
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