PPAS obs BD 2008-07-22 thru 2008-07-25

From: Bram Dorreman (bram.dorreman@gmail.com)
Date: Mon Jul 28 2008 - 14:58:30 UTC

  • Next message: Brad Young: "BY Classfd.tle Jul 28"

    Observations of satellites with (more or less) periodic brightness
    variations. All observations by 7 x 50 binoculars.
    The reported times are those of the last timed maximum.
    Unless they have format hh:mm then it is an approximate time.
    
    yy-nnncc yy-mm-dd hh:mm:ss.s ooo sss.s s.s nnn ff.fff comments
    65-  8 A 08-07-23 23:39:11.5 BD  140.5 0.1  24  5.85  A; +7.8->inv; 4)
    65-  8 A 08-07-24 23:52:57.1 BD  262.8 0.2  45  5.84  A; +7.8->inv; 10)
    88- 89 A 08-07-24 22:34:09   BD   67.0 0.5  10  6.7   F ssf; 9)
    91- 39 A 08-07-24 02:15:00.7 BD   81.6 0.3   5 16.3   F ssf
    93- 50 A 08-07-22 21:31:03.2 BD   63.1 0.2  12  5.26  A; +4.5->7.5
    93- 56 B 08-07-25 00:31:12.2 BD   53.9 0.3   5 10.8   A; +7.2->inv
    96- 37 A 08-07-23 22:49:39.6 BD   54.6 0.1  10  5.46  A; +7.5->inv; ssm
    96- 37 A 08-07-24 21:58:39.2 BD   60.7 0.2  11  5.52  A sf; +6.0->inv
    97- 30 G 08-07-24 21:31:40.2 BD   70.3 0.1  13  5.40  F; +3.1->inv; ssf
    97- 34 C 08-07-24 00:01:47.5 BD   97.4 0.1  61  1.60  F'f; +2.0->inv; 5)
    97- 34 C 08-07-24 23:24:03.1 BD   29.5 0.1  19  1.55  F'f; -2.0->inv
    02- 24 A 08-07-23 21;57:32.0 BD  230.0 0.2  12 19.2   Irr; +7.0->inv; 3)
    02- 36 C 08-07-23 21:04:42.4 BD   53.8 0.1  20  2.69  A
    02- 36 C 08-07-23 23:05:27.6 BD  102.7 0.1  38  2.70  A; +6.8->inv
    02- 46 B 08-07-23 23:27:59.8 BD  132.8 0.1  37  3.59  A; +5.8->inv; 12)
    02- 46 B 08-07-24 22:10:54.3 BD  125.8 0.1  35  3.59  A; +4.5->inv
    05- 48 C 08-07-24 02:21:02.1 BD  122.1 0.1  16  7.63  A
    05- 48 C 08-07-25 01:18:24.5 BD  228.0 0.1  30  7.60  A
    06-  6 B 08-07-22 21:49:42.6 BD   14.2 0.2  15  0.95  A; +7.0->7.8
    06-  6 B 08-07-24 21:04:42.7 BD   78.7 0.1  40  1.97  A; +6.5->7.8
    06- 60 B 08-07-23 21:20:18   BD   94.0 3     2 47     a; +3.2->7.5; 2)
    07-  5 E 08-07-24 00:31:40   BD   54   0.5   4 13.5   F; +2.0->inv; 6)
    07-  5 F 08-07-24 00:31:40   BD   77   0.5   4 19.3   F; +2.0->inv; 6)
    07- 30 B 08-07-24 01:51:34.3 BD   92.8 4     2 46     A; +4.5->8.0; 7)
    08- 21 K 08-07-23 21:27:30.4 BD   93.1 0.2  11  8.46  Irr; 11)
    08- 25 E 08-07-23 21:16:50   BD  117.0 0.5  14  8.4   a; M,; +5.5->6.5; 1)
    08- 26 B 08-07-22 22:06:32.7 BD   70.1 0.8   3 23.4   A; +4.8->6.5
    08- 26 B 08-07-24 20:47:39.6 BD                       Irr; +3.0->7.5; 8)
    08- 31 G 08-07-23 20:45:38.2 BD   83.4 0.2   9  9.27  A'A; +2.8->6.5
    08- 31 G 08-07-23 22:27:42.8 BD  141.1 0.2  15  9.41  A; +3.0->inv
    08- 31 G 08-07-24 21:18:35.9 BD  209.2 0.2  22  9.51  A; +3.0->inv
    
    Notes:
     1) 2008-025E: pressed wrong stopwatch button;
        reconstruction from voicerecording
     2) 2006-060B: difficult to determine the time of max brightness
     3) 2002-024A: timings and groups counting to one period within parentheses
        (8.58 10.39) (6.47 11.88) (6.34 1.53 12.68) (7.82 10.47) (5.90 13.49)
        (9.10 9.95) (5.97 14.19) (8.25 10.10) (9.36 9.75) (8.66 11.32)
        (5.32 3.76 10.24) ((9.26 9.34)
        Mostly the maxima were alternating bright and faint.
     4) 1965-008A: assuming I missed several maxima because they were too faint
        to be seen in my 7 x 50 binoculairs. The timings are:
        23.44 11.58 5.98 29.30 11.67 6.11 6.25 5.73 6.12 5.30 5.59
        11.80 5.96 5.63
     5) 1997-034C: Faint maxima followed brigth maxima within 0.3 second
     6) 2007-005E & 2007-005F: From voice recording because they were crossing
        not far from each other; Nice sight
        Bright flash at top of undulation for both objects.
     7) 2007-030B: timings (37.0 14.0) 41.8
     8) 2008-026B: difficult to find a pattern, timings are:
        6.18 8.97 27.70 9.12 10.89 9.68 13.61 20.68 28.17 18.84 27.59
     9) 1988-089A: based on voice recording
    10) Assuming I missed several maxima because they were too faint
        to be seen in my 7 x 50 binoculairs. The flash period is consistent
        with the value obtained 24 hours before.
    11) 2008-021K: timings and groups counting to one period within parentheses
        (2.54 3.57 2.61) (2.81 3.39 3.04) 25.40 (3P) (4.23 3.41) (5.17 3.51)
        8.55 (5.25 3.34) (1.52 3.95 3.07) (1.42 4.33 1.98)
    12) 2002-046B: The maxima were alternating bright and faint.
    
    Qualitative observations
    
    1965-073F:
    I followed it during at least 3 minutes in several transits and did
    not find any variability in brigthness other than due to change in phase and
    distance.
    
    1966-111C:
    Same remark.
    
    2006-014B:
    Steady
    
    Satellites with brightness variations for which no period was determined:
    1969-009A very nice period; had no timing devices available
    1969-082J lost and refound twice: no timings unfortunately
    1976-091A
    1986-070B may be
    1992-023A short period
    1992-073B long period
    1997-077B pattern F'_fa
    1997-082B Irregular
    1996-014A
    1999-022C long period
    2002-026B very long period
    2005-043G long period
    2006-026A
    
    Site 4160: 51.27931 N, 5.47683 E (WGS84), 35 m
    Bram Dorreman
    
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