Wednesday, September 24, 2008

Brilliant ISS passage

I normally don't watch for overflights of the International Space Station. After the showing it made during Saturday's Public Night at the Observatory, however, I decided to watch again Monday night. From our balcony (aka "Chaunticlair Observatory") I began watching for the distinctive unblinking light at a little after 7:40 PM EDT. Still in fairly bright twilight the bright, moving "star" appeared as expected in the west-southwestern sky and climbed high overhead. Predicted brightness was -3 magnitude and it was brilliant. Because the Sun had not set long before, I watched the ISS as it made a complete arc overhead and down into the east ... it did not disappear into Earth's shadow before it was obscured by distant trees. Most impressive was just how bright the ISS was in the not-very-dark twilight sky.

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