This from a couple of nights ago, a Starlink train going overhead; compared to the magnitude 2.5 star Menkar in Cetus they were brighter!!!
This is what they look like as 3 second streaks composited into one image from the 12 frames. With longer exposures these streaks would be solid lines across the whole frame.
The stacking software has jiggled a bit from the Starlink streaks, but one can see the effect.
Nikon D800 with Nikkor 105mm f/2.5 (pre-Ai version - Ai modded), 3 second exposures.