Re: ETS 6 Watch 2000

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Sun Jan 23 2000 - 23:44:40 PST

  • Next message: Bjoern Gimle: "Re: Re: ETS 6 Watch 2000"

    At last I managed to see ETS-6 #23230 94-56A from Sweden. I was watching
    from UT 16:56, 30 seconds naked eye, then 30 sec in 7*50 binoculars etc.
    After two minutes I found it in binoculars, and shortly after the flashes
    were mag 1-2. Then, I phoned my friend who had helped me trying to find this
    one on previous opportunities, and unfortunately I missed the transition
    event during that time.
    
    Here are my flash timings; add 16h 00m 49s for UT:
    58:46.61, 58:49.59, 58:57.87, 59:00.74, 59:09.30, 59:12.03, 59:20.62,
    59:23.39, 62:12.49, 62:18.11, 62:20.96, 62:23.64, 62:26.46, 62:29.47,
    62:34.96, 62:40.95, 62:46.26, 62:51.90, 62:57.51, 63:08.78, 63:14.64,
    63:20.13, 63:25.82, 63:31.59, 63:42.68, 64:05.18, 64:10.75, 64:16.43,
    64:27.78, 64:33.88, 64:45.21, 64:50.48, 64:55.96, 65:01.52, 65:12.80,
    65:24.07, 69:26.41, 69:49.04, 69:54.73, 70:00.22, 70:06.36, 70:11.27,
    70:22.67
    
    (Further gaps are intentional, because I only had about 60 memory places
    left on my stopwatch.) As numbers, these show very little, but visually the
    first few were a bright flash followed 2.9 seconds later by a secondary.
    During the break, the secondary became the brightest, and a new tertiary
    series appeared 5.7 seconds after the secondary. In the beginning of this
    second phase I did see one faint corresponding to the primaries, and one
    faint between the secondary and tertiary. In the final phase, the tertiary
    flashes were the brightest.
    
    Ed Cannon wrote:
    >I have the possibly interesting problem that, since I
    >didn't watch it continuously in binoculars, there are
    >gaps in my timings -- and they don't fit into a neat
    >time sequence.  That is, for example, the time from the ...
    
    This, and the horrible number sequence above, is hardly a problem using a
    plot of the absolute time of each flash, minus an integer multiple of an
    assumed period (program SYNODIC). These ETS-6 timings are shown in
    http://www.algonet.se/~b_gimle/gif/ETS-6.gif
    
    When the period is correctly choosen, all flash series appear as horisontal
    bands. Missing timings are just missing marks, and do not affect subsequent
    timings, or require additional arithmetic or guessing the number of periods
    missed.
    
    -- bjorn.gimle@tietotech.se (office)                         --
    -- b_gimle@algonet.se (home)  http://www.algonet.se/~b_gimle --
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