Kurt Jonckheere writes: > How many periods have you timed and what are the timings ? I guess you want me to break down: 98- 43 G 98-07-24 4:01:52.8 WN 43.9 .8 3 14.64 __', Resurs 1-4 r, 25400, initially S near Arcturus, then began to dim briefly, sub-periods 6.75s + 7.89s = 14.64s minima measured as much more precise than M maxima 98- 43 G 98-07-26 3:14:39.4 WN 44.6 1. 3 14.86 __', Resurs 1-4 r, 25400, initially S to well past C, then began brief dips, sub-periods 6.38s + 8.48s = 14.86s minima measured as much more precise than M maxima The intervals were, respectively: 6.92 8.04 7.15 8.23 6.19 7.40 -and- 8.26 6.53 7.67 5.49 9.50 7.13 each beginning at the specified time. These things are tricky to measure as the dips become progressively deeper as the object heads North. You can't measure the maxima accurately, and the minima become more and more speculative once they become invisible. But the pattern is unmistakable. Kurt mentions other Zenits which appeared different in different parts of the sky: > E.g. see ppas 94- 23 B, 94-06-23 TC : only var(FF) low in NE I can't remember such an object which displayed brief dips, let alone progressively deeper dips. Cheers. Walter Nissen email@example.com -81.8637, 41.3735, 256m elevation --- If we examine people's strengths, we find we can rate everyone above average.