Re: single flash cosmos 1523,#14612,84001B?

From: Bram Dorreman (bram.dorreman@gmail.com)
Date: Thu Mar 25 2010 - 01:25:07 UTC

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    Originating:
    Date: Wed, 24 Mar 2010 11:05:37 +0800
    From: ykchia <chiayk1@singnet.com.sg>
    
    who writes:
    Hi folks:
      Trying to ID a single flash from a wide angle field. One candidate
    turns up at the RA, dec matching time and direction of travel running
    the bulk tle from space-track.    But the trouble is how do i know
    whether this so called candidate had structure that might cause the
    flash ? -> Cosmos 1523, 84001B. This one is not on ppas list so i
    assume it must be simply a observ_sat_sun angle induced single flash.
    
    Bram's reply:
    The fact that 84001B was never reported and added tot the PPAS does
    not mean that objects like 84001B have never been observed. I lokked
    in the PPAS for similar objects and found the following records:
    
    70- 36 A 70-12-06 01         MM                 0.81  some max inv
    70- 36 B 70-09-06 04         MM                 1.2
    70- 36 B 70-12-02 02         MM                 1.4   multiple max
    70- 36 B 70-12-05 01         MM                       irr flashes
    70- 36 B 70-12-06 01         MM                       irr flashes
    70- 36 C 70-05-23 23         HK                 0.5   a
    70- 36 E 70-09-10 02         MM                 1.25  multiple flashes
    70- 36 F 70-09-06 04         MM                 2.8   dm
    71- 41 A 71-05-14 23         DB                 0.73  sf
    71- 41 A 71-05-17 23         DB                 0.74  sf
    71- 41 A 71-05-19 23         DB                 0.76  sf
    71- 41 C 99-09-06 21:51:03   RO                       mag 10 Steady
    71- 41 E 00-11-26 18:55:36   RO                       mag 10.5
    74- 24 F 74-05-18 21         HB                 0.34
    74- 72 G 00-11-19 20:36      GR                       mag +6.9
    75- 16 A 75-03-20 21:26      HK                 0.5   a
    75- 16 C 00-08-04 21:31:17   RO                       S 6
    75- 16 D 75-03-17 21:26:30   HK        0.3      0.3
    75- 16 E 75-03-16 21:52:30   HK                 0.3
    75- 16 E 75-03-30 20         HB                 4     max mag +9.2
    75- 16 F 75-03-17 21:48      HK        0.3      0.3
    75- 16 G 75-03-25 20         VB                 6.47
    75- 16 H 99-09-06 22:17:35   RO                       mag 11
    75- 45 B 75-06-08 00         LA                       S
    75- 45 B 75-06-10 23:37      HK                 1.33
    75- 45 C 75-06-07 23         LA                       S
    75- 45 D 75-06-07 01         HB                 1.38
    75- 45 G 75-06-08 01         LA                       S
    75- 86 B 95-07-31 23:53:     RO                       MAG 8 STEADY
    75- 86 D 99-09-07 22:41:21   RO                15     +/- mag 10 to 11
    77- 79 B 77-10-15 20:02      BD   22.2      12  1.85
    77- 79 B 77-10-20 20:15      BD                 2     a
    77- 79 B 79-05-14 21:00:04   BD   55.8      10  5.58
    77- 79 E 77-09-04 20:48      BD                 5     a
    78-  5 B 78-06-10 23:49      BD                 2     a
    78-  5 C 78-06-10 22:42      BD                 0.5   a
    78-  5 E 78-06-10 23:01      BD                 2     a
    78-  5 F 78-06-17 22:07      BD                 5.9
    78-  5 H 78-03-26 19:55      BD                 2.5   a
    78- 56 B 78-06-24 22:21:00   BD             10  1.35
    78-109 B 92-09-26 20:43:14   BD  114.5 0.5   4 28.6   mag +6.5->inv
    78-109 B 95-03-23 19:42:45   LB  196.7 5     1 197    MM, mag 5->inv
    78-109 G 08-06-30 05:06:34   BY   13.3 0.4   2  6.6   A,; +9->inv; 37X
    80- 12 E 00-08-21 22:13:37   RO                       V mag 7
    80-102 F 00-12-25 16:45:08.0 RE                 0     F, 6.5->8.8
    81- 22 F 94-08-29            MM                110    v4!,var from 5 to 9
    81- 22 F 99-06-13 23:08:08   RO                       mag 3 VAR
    81- 22 F 00-12-25 20.52      GR                       S 5.7 faded out to inv.
    82- 40 C 82-10-03 19:01:15   HK                 1.2   a, var max, mag +6-inv
    83-  2 H 99-08-03 23:50:16   RO                       mag 10
    84-  1 A 98-07-18 21:42:38   RO                       S, mag 7
    84-  1 E 99-06-09 22:16:30   RO                       VAR mag 4 -> 9
    84- 52 B 94-08-20 00:47:30   PN                       flare +4.5 duration 3s
    85- 23 A 85-04-20 21:40      BD   14.4      10  1.44
    85- 23 A 85-04-21 20:49      BD   14.8      10  1.48  f'f'
    85- 23 B 85-04-19 21:15      BD   15.1      10  1.51  f'f'
    85- 23 C 85-04-20 21:13      BD   14.7      10  1.47
    85- 23 G 85-04-20 20:44      BD   17.3      10  1.73  f'f'
    85- 23 H 85-04-19 20:44      BD   16.6      10  1.66  f'f'
    86-  2 A 86-09-28 21:52      BD   22.2       6  3.7   f'f'
    86-  2 B 86-09-25 20:57      BD   26.0       6  4.3   f'f'
    86-  2 B 86-09-26 22:06      BD                 5     a f'f'
    86-  2 C 86-03-11 04:45      BD                 0.3   vm, mag +3.0
    86-  2 D 86-03-11 04:11      BD                 0.5   a
    86-  2 E 86-07-29 21:00      BD   19.3       6  3.22
    86-  2 F 86-07-12 00:28      BD                 0.9   a f'f'
    86-  2 F 99-09-07 23:59:53   RO                       mag 11 to 12 AND LOST
    86-  2 G 86-07-12 00:23      BD                 0.3   a f'f'
    86-  2 H 86-03-11 03:45      BD                 5     a
    86-  2 H 06-06-08 18:24      GR                       V;
    86- 42 A 86-07-11 23:53      BD    7.4      10  0.74
    86- 42 B 86-11-09 04:36      BD                 0.7   a
    86- 42 C 86-09-19 22:49      BD                 1.7   a f'f'
    86- 42 E 86-07-12 00:34      BD                 0.3   a f'f'
    86- 42 G 86-07-12 00:35      BD                 0.5   a f'f'
    86- 42 H 86-09-28 21:05      BD                 0.9   a f'f'
    86- 92 A 96-11-15 18:27      WV                       S +7
    86- 92 C 87-07-18 23:14      BD   11.5      10  1.15
    86- 92 F 87-07-19 00:16      BD   15.3       4  3.83
    87- 51 D 05-09-20 20:23      BD                       V?; one flare +6
    87- 51 H 87-07-18 23:12      BD    9.6      20  0.48
    88- 16 B 96-01-15 18:10      TC                       S, mag +2, u->shadow
    90- 29 B 92-03-01 19:16:21   BD   96.2 2.0   2 48.1   mag +6.3->8.3
    91-  9 B 91-06-02 20:47      FW    8.6 .15  20  0.43  clouds
    91-  9 G 91-04-01 02:29      MM                 0.4   or 0.5, mag +8.5->9.5
    92- 30 C 99-09-07 23:26:52   RO                       mag 10 Steady
    92- 30 F 00-10-23 19:43:38   RO                       flashes mag 6.5
    
    If you use font courier-new you'll see proper columns. These small
    Kosmos-satellites, launched eight by one Kosmos-rocket were never
    popular, I suppose for two reasons:
    - they are small and in rather high orbits, so faint
    - can we expect a mutual flash period evolution like with the rockets
    that luanched them.
    No observer included them in their observation programs. Some of the
    obsercers observed these Kosmos a few times.
    
    I remember  I tried to find them short after launch. Some other times
    I saw them unintentionally and had to identify them.
    
    When I see such a flash and position and direction by the prediction
    are according the observation I accept that identification.
    
    Happy observing,
    
    Bram Dorreman
    PPAS Collector
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