A microradian is about 0.2 arcseconds, the size of one meter at a
distance of one thousand kilometers. I'm guessing the width of the streak is
about five arcseconds or 25 microradians. That could be some satellite 25
meters in size at a thousand kilometers or five meters at two hundred
kilometers. The latter figure could correspond to a rocket stage tumbling
end-over-end in low earth orbit. Merely a plausible guess.