Tumblers observed + USA 160

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Sun Sep 09 2001 - 18:35:17 EDT


Tonight I observed from site 5918 a nice flash series from Ir 44 (tum),
completely at 1-power. I first saw it (because of clouds?) below the handle
of Big Dipper, the second (first one timed at 18:55:33.4 UTC 2001-09-09)
below epsilon UMa, both were -3 or -2. There was a phase shift after the
second timed flash, next flash (mag +2) only eight seconds after, followed
by eleven flashes at 23 seconds interval - all except the last one, at 8
deg. alt. (still at 1x), had  -tive magnitudes.

Analysis with SYNODIC.EXE shows a clear synodic (!) effect - period around
culmination is about 23.00 s or larger, about 22.80 s low in the N. Best fit
average is 22.87 seconds period.

Lap times: 23.23 8.68 22.98 23.04 22.96 22.98 22.83 22.83 22.85 22.75 22.71
22.86

I also observed what seems to have been the new Centaur and two payloads.
Some 75% cloud cover, illuminated by Moon and city lights, and no tape
recorder at hand, made stellar identification uncertain. Magnitud about +3
steady, payloads +5 steady and separated by about 2.5 degrees (6.3 seconds)

At 21:24:26.7 UTC RA 01:13:36 Dec.+28 39'
   21:24:49.1 7 degrees left, in Dir=260 deg.
   21:25:38.5 RA 02:27:18 +32 00'
   21:26:47.2 First payload near 01:20 +30
   21:26:53.5 Second payload at same place

-- bjorn.gimle@tietotech.se (office)                         --
-- b_gimle@algonet.se (home)  http://www.algonet.se/~b_gimle --
-- COSPAR 5919, MALMA,    59.2576 N, 18.6172 E, 23 m         --
-- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m         --


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This archive was generated by hypermail 2b29 : Thu Sep 20 2001 - 17:55:53 EDT