This is my second attempt at capturing the International Space Station as it flew by.
My first attempt was a disaster as I couldn't get it in the field of view at all. Its quite difficult as although its nearly as big as two football pitches, its a long way away and travelling at around 17500 miles an hour. When it first appears low down in the sky its around 907 miles away and within 3 minutes and 21 seconds it is nearly overhead and just 260 miles away. I used a 10 frames per second afocal webcam and my Meade Etx105pe. I pre focussed it on a star as there is no time to focus on the ISS.
During this time the shape and angle of its image changes, so stacking too many images won't work. In fact my aim was so bad that this image is made from just two images out of 2,305. I think I can do a lot better next time as this image is overexposed and blurred possibly from camera shake. I am going to try a moon filter as it was so bright and reuse the machine gun approach guided by my red dot finder but position the scope in front of its path so it passes through the frame. I hope this approach will allow the vibration to settle before capturing the image. I will hopefully post the results soon.
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