Failed Lacrosse flare
Streaks of cirrus occupied the sky at that time. About 1 minute before Lacrosse 5, I observed Lacrosse 2 (91-017A, #21147) pass through the zenith at a bright mag. +2. A minute later Lacrosse 5 however turned out to be very faint, mag. +3.5 or fainter. It did not flare, and the trail on the photographic image is very marginal. I only used one position of it, as the other one came out as an obvious anomaly.
Lacrosse 2 is visible in the same image, but in a streak of cirrus, and hence very marginal. I did not get usable positions on it.
During the next pass of Lacrosse 5, at 18:50 UTC and 48 degree maximum sky elevation due North, it was brighter (about mag. +2.5) . It easily registered on the photographic image (see below), and added two positions.
The three positions obtained on Lacrosse 5 in total suggest it was on-track, and about 0.2s late relative to a 4-day-old elset.