Attached is an observation I made last year that may help newcomers understand what they will see. Personally I would not worry about making this sort of detailed observation on your first attempt. Just finding it and getting a time of equal flashes to a few minute would allow others to see it after Rob recomputes maximum visibility times. Ron Lee This was my third attempt with 7x50 binoculars and my first quality obs. Times/dates are UT unless otherwise stated. The satellite first became visible at about 02:44:52 UT on 2 Mar 97. I observed three 23.4 second flashes before the fainter flash was detected. Below are the stopwatch lap number (flash number), lap time from previous flash and UT of Flash along with comments recorded on a tape. Only enough flashes are included to show justification for later analysis of mid point. Flash Lap time UT Comment 10 11.72 02:47:24.6 Faint 11 11.67 02:47:36.3 Bright; Brightest yet 12 11.75 02:47:48.0 Faint 13 11.66 02:47:59.7 Bright; less than #11 14 11.70 02:48:11.4 Faint (See #15) 15 11.69 02:48:23.1 Bright, almost like #14 16 11.70 02:48:34.8 Bright, same as #16 17 11.68 02:48:46.5 Bright, a little fainter 18 11.98 02:48:58.4*** Brightest yet; bad time 19 11.44 02:49:09.9 Bright 20 11.68 02:49:21.5 Bright; same as #19 21 11.72 02:49:33.3 Bright: a little fainter 22 11.68 02:49:45.0 Bright; like #21 23 11.70 02:49:56.7 Faint 24 11.77 02:50:08.4 Bright 25 11.66 02:50:20.1 Faint 26 11.62 02:50:31.7 Bright 27 11.8 02:50:43.5 Faint; hard to see *** Bad time. See below for correction Note: I use the Faint/Bright terms to differentiate relative brightness changes between flashes. It is not an absolute term! Also, the UT times are rounded to the nearest 0.1 sec. Analysis: If you follow the pattern of Faint/Bright flashes as shown in Flashes #10-14, through flashes #15-22, you will see a discontinuity once you reach #23. This is the phase shift previously reported. Using those times to define a mid point would yield a time about 02:48:58 UT if #14 is assumed the same brightness as #15. This basically puts the mid point near flash #18 which I recorded as the brightest flash (likely brighter than #11). noting that #18's lap period is high and #19's is low, I would subtract about 0.26 second from the recorded #18 time of 02:48:58.42 UT to get 02:48:58.16 UT (2 Mar 97) as the actual midpoint. Accuracy of the midpoint may be off by as much as one 23.4 second period, but I have a high confidence level in this obs and derived midpoint. The satellite was not observed until no longer visible since a Flash satellite was due at 02:54 UT, but I estimate that in my binoculars, it was only visible for about 7 minutes.