Two subs later in the same Canon sequence, a shorter streak in the upper left of the frame, noticeably brighter at its leading end and tapering away behind it. It crosses the star trails at a slant instead of following them.
Placeholder - the classification reasoning is still to be written. The star trails are dashed because the Canon was on an interim capture cadence; the period it was in use has not been established yet, so the dashing says nothing about how long this track was present. The brightness gradient along the track is the useful observation: a flare that fades is what a meteor does, where a satellite catching sunlight lights more evenly. Both ends are interior to the frame. No timestamp on this crop, so there is no sun-altitude cross-check.