On Mon, 29 Jan 2018 21:16:07 +0100, Paul Schlyter
wrote:

On Sun, 28 Jan 2018 09:03:13 -0700, Chris L Peterson
wrote:
It is likely to be worse than either, because it is so bright, and
because it is bright across its entire path, not just in a flare
zone.

No, it's not bright across its entire path. It has 72 reflective
triangular surfaces. Only half of then can be effective of course
since the other half will be in shadow. And less than half of those
will shine towards the Earth, the others will shine into space. So it
will generate some 15 flare zones, each giving flares considerably
fainter than Iridium.

That assumes the satellite is not changing orientation. The
description I've read says it is deliberately placed in a tumbling
orbit so everyone sees a sparkling path.