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09 ISS Trail

09 ISS Trail

This composite image was taken starting at 20:02 on September 30, 2019 from Long Beach on the West Coast of Vancouver Island. The gaps in the ISS trail are from the 1 sec intervals between 10 sec exposures. After emerging from the twilight and light pollution from Tofino to the north, the ISS passes by Arcturus and Boötes, and then just left of Mizar at the bend in the handle of the Big Dipper. (Close inspection reveals the presence of Alcor between Mizar and the ISS trail – also, further to the right of Boötes, Corona Borealis, with the trapezoid of Hercules visible above, and Serpens Cauda and the northern half of Opiuchus above and to the left of the crescent moon.) After slowly emerging from the luminous western sky, the image of the ISS accelerated as it exited the camera frame on its way to its zenith. It later began to slow as it approached Cassiopeia before disappearing into the Earth’s shadow after passing through Andromeda. On its next orbit, approximately 90 min later, it would have appeared slightly south of Arcturus and then swept leftward past the Corona Borealis, and on through the Summer Triangle. To begin to understand such complex tracks of a satellite whose orbit is essentially a simple, almost circular ellipse, one has to adopt the perspective of Paul McCartney’s Fool on the Hill who “sees the sun going down, and the eyes in his head see the earth spinning around.” Capture details: Canon 5D camera on a fixed mount, 17-40 mm zoom lens set to 17 mm, aperture 4.5, 30 x 10 sec exposures, ISO 400.
Category:Scenic
Subcategory:Night Sky
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