This is what a 2.5 second exposure looks like hand held and zoomed a bit .. (first pic has Southern Cross pointers on the left for reference - the ISS went between these and then disappared into the earth's shadow)


Start
Time: 18:46:00
Alt: 10
Az: SSW
Max Altitude
Time: 18:48:34
Alt: 30
Az: SSE
Ends
Time: 18:48:34
Alt: 30
Az: SSE
Magnitude: -2.2
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