Raduga 27 obs Feb 7

From: Björn Gimle (b_gimle@algonet.se)
Date: Sat Feb 08 2003 - 10:55:48 EST

  • Next message: David Brierley: "DMB Obs Feb 3-5"

    Flashing has accelerated 1 s since I saw it a week ago.
    91- 14 B 03-02-01 21:04:00   BJG1115.2 0.3  17 65.6    F (inv) F
    91- 14 A 03-02-07 20:23:34.86BJG7950.680.3 123 64.640 FfF, 5(7)->i
    91- 14 A 03-02-07 18:30:18.5 BJG1034.340.2   8129.292 FfF, 5(7)->i
    91- 14 A 03-02-07 20:23:34.86BJG 840.080.2  13 64.625 FfF, 5(7)->i
    
    I had clouds in SW where Gorizont 16 and TDF-1 where.
    
    R.27 was quite easy at 18:13 UTC, I found it immediately and (almost) all
    flashes were bright.
    At 18:59, after a 30 min warm-up (-15 C here at #5919) some flashes were
    fainter.
    Last period from 20:11 several flashes were missed, or fainter.
    
    Period is probably 129.280 s - of the last pass 5 flashes were on integer
    multiples, only 2 on half-period (in the first pass 9 integer, 7 half)
    
    I am very surprised at the low residuals at so long flashing intervals.
    Even so, there is clear graphic indication that the period was higher on
    the first pass (>129.292), lower on the last (129.25, not random
    variation?).
    
    Stopwatch 0:00:00 = 18:09:00.6 UTC 2003-02-07
    
    Timings:   Lap:   Residual from 64.64 s:
    
    0:04:03.58              0.12
    0:05:08.18 64.60        0.08
    0:07:17.58 129.40       0.20
    0:08:22.10 64.52        0.08
    0:09:26.70 64.60        0.04
    0:10:31.37 64.67        0.07
    0:11:36.04 64.67        0.10
    0:12:40.70 64.66        0.12
    
    0:13:45.29 64.59        0.07
    0:14:50.04 64.75        0.18
    0:16:59.44 129.40       0.30
    0:19:08.72 129.28       0.30
    0:20:13.44 64.72        0.38
    0:21:17.92 64.48        0.22
    0:50:24.62 1746.70      1.64  First after pause - too late
    0:51:27.91 63.29        0.29
    0:52:32.64 64.73        0.38
    0:53:37.22 64.58        0.32
    0:54:41.81 64.59        0.27
    2:02:34.18 4072.37      0.32
    2:04:44.17 129.99       1.03  Second after pause - too late
    2:09:01.88 257.71       0.18
    2:10:06.54 64.66        0.20
    2:11:11.04 64.50        0.06
    2:13:20.51 129.47       0.25
    2:16:34.26 193.75       0.08
    
    
    -- 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 : Sat Feb 08 2003 - 11:11:18 EST