I decided to finally try manually tracking the ISS with my Dobsonian scope. I used my ASI183MC and a 2x Barlow, aligned the spotting scope, and waited for it to come over the trees around 10:28PM. That thing is moving! It orbits the Earth with a velocity of 17,500 miles per hour, letting it make a complete orbit in 90 minutes. Tracking it near zenith was about impossible on the Dobsonian mount.
This pass had its maximum altitude around 80 degrees, making its closest distance about 260 miles away. The angular size of it was a little over 50 arcseconds. I am not sure what my actual pixel scale is due to the Barlow. I took a sequence of 0.28ms exposures with a gain of 330. Focus may not have been great since I could not easily track a star at this focal length beforehand. For a first attempt, though, I am surprised by what I was able to see! The image is a stack of five images close together, as I only had about 8 total images with it not skewed by the rolling shutter or just missed entirely.

Here is a close up image of it in space, allowing you to compare the visible features from my image,
