PPAS obs BD 2007-11-21

From: Bram Dorreman (bram.dorreman@gmail.com)
Date: Thu Nov 22 2007 - 00:12:14 UTC

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    Observations of satellites with (more or less) periodic brightness
    variations. All observations by 7 x 50 binoculars except when marked "1x",
    meaning naked eye observation.
    The reported times are those of the last timed maximum.
    Sky was good. Some moonlight.
    
    yy-nnncc yy-mm-dd hh:mm:ss.s ooo sss.s s.s nnn ff.fff comments
    82-118 A 07-11-21 17:35:37.4 BD   76.3 0.5   4 19.1   Irr; +4.5->inv; 1)
    82-118 A 07-11-21 19:15:27.0 BD   55.5 0.5   3 18.5   A; +5.5->8.0
    83- 22 A 07-11-21 17:29:27.8 BD   41.0 0.2   7  5.9   FA'; +3.0->inv; ssm
    85- 94 G 07-11-21 17:59:19.4 BD   58.9 1.0   3 19.6   A; +6.5->8.0
    86- 73 A 07-11-21 18:14:09.6 BD  175.2 0.5   6 29.2   M; +6.0->inv; 5)
    97- 56 C 07-11-21 17:53:54   BD                       One +1.5 flare; neo
    99- 57 A 07-11-21 18:28:36.2 BD  172.1 0.4  34  5.06  +1.2->inv; 6); 1x
    00- 33 D 07-11-21 17:16:23.5 BD  154.5 0.2  32  4.82  M=>A; +3.9->inv; 2)
    07- 27 B 07-11-21 18:34:28.4 BD   59.9 5     1 60     A; +1.8->3.3; 1x
    07- 29 B 07-11-21 17:42:45   BD   51   0.5  40  1.28  A; +2.8->inv; 3); 1x
    07- 38 B 07-11-21 17:44:40   BD   93   0.5  60  1.55  A; +5.0->inv; 3)
    07- 53 B 07-11-21 18:05:04.4 BD   27.1 0.1  30  0.90  F; +6.5->inv; 4)
    
    1) different times between maxima; difficult to determine a
      flash period. Maxima were counted with following intervals:
      18.46 (12.22 7.22) 16.62 (11.83 9.94)
    
    2) M=>A: flat maxima evolving to round maxima.
    
    3) Reconstructed from voice recording due to wrong stopwatch handling
    
    4) Presumably hp.
    
    5) different times between maxima; difficult to determine a
      flash period. Maxima were counted with following intervals:
      22.77 30.54 56.58(2max?) 29.04 36.26
    
    6) Excellent transit. Best maxima +1.2. Flash pattern between F and A.
      Maxima became fainter the more the transit progressed. Then binoculars
      were needed.
      (South-Northwest transit). A bit reddish color.
    
    The URL explaining the format of PPAS observations :
    http://www.satobs.org/tumble/flashpm.html#PPASformat
    
    Site 4160: 51.27931 N, 5.47683 E (WGS84), 35 m
    Bram Dorreman
    
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