Re: I seem to have a problem = unid sat

From: C. Bassa (cgbsat@gmail.com)
Date: Thu Apr 04 2013 - 17:00:13 UTC

  • Next message: alberto rango: "4542 SATOBS 03APR 2013."

    Hi Kevin,
    
    Thanks for providing both videos. I used my software to extract the
    observations below from your time-stamped videos, where the first nine
    are from the first video and the others from the second.
    
    The data in the first video suggested the object was geostationary
    transfer orbit, though it was not clear if it was moving towards
    perigee or towards apogee. The data from the second video confirms it
    is the latter, as the points show a clear arc and a decreas in the
    angular velocity. Furthermore, the object appears to become fainter.
    
    The arc is not long enough to constrain all orbital
    parameters. However, it is possible to fit the other orbital
    parameters while keeping the mean motion fixed. Below I provide search
    orbits for a mean motion between 2.0 and 2.4 revolutions per day. These
    orbits confirm your assumption that the object is in a geostationary
    transfer object, as the eccentricy places the apogee near the
    geostationary altitudes.
    
    It may be that this unknown is the same object as the one you were
    looking for, i.e. your unknown from March 30th
    (http://www.satobs.org/seesat/Mar-2013/0186.html), as the 99301, 99305
    and 99309 orbits are quite near your two observations from that
    day. If you still have the video of that unknown, could you share it?
    I'd like to obtain a few more points from it.
    
    Regards,
       Cees
    
    Observations:
    99300 13 594A   1775 G 20130404022802128 17 25 0752621-054902 37 S
    99300 13 594A   1775 G 20130404022812129 17 25 0753849-054845 37 S
    99300 13 594A   1775 G 20130404022822129 17 25 0755081-054780 37 S
    99300 13 594A   1775 G 20130404022832128 17 25 0756303-054725 37 S
    99300 13 594A   1775 G 20130404022842129 17 25 0757509-054661 37 S
    99300 13 594A   1775 G 20130404022852128 17 25 0758702-054604 37 S
    99300 13 594A   1775 G 20130404022902128 17 25 0759905-054540 37 S
    99300 13 594A   1775 G 20130404022912129 17 25 0801087-054488 37 S
    99300 13 594A   1775 G 20130404022920945 17 25 0802122-054438 37 S
    99300 13 594A   1775 G 20130404022935771 17 25 0803852-054368 37 S
    99300 13 594A   1775 G 20130404022945771 17 25 0805008-054315 37 S
    99300 13 594A   1775 G 20130404022955771 17 25 0806150-054267 37 S
    99300 13 594A   1775 G 20130404023005771 17 25 0807286-054222 37 S
    99300 13 594A   1775 G 20130404023015770 17 25 0808415-054182 37 S
    99300 13 594A   1775 G 20130404023025771 17 25 0809531-054139 37 S
    99300 13 594A   1775 G 20130404023035771 17 25 0810645-054093 37 S
    99300 13 594A   1775 G 20130404023045771 17 25 0811760-054055 37 S
    99300 13 594A   1775 G 20130404023055771 17 25 0812846-054016 37 S
    99300 13 594A   1775 G 20130404023105771 17 25 0813952-053978 37 S
    99300 13 594A   1775 G 20130404023115770 17 25 0815017-053944 37 S
    99300 13 594A   1775 G 20130404023125771 17 25 0816091-053908 37 S
    99300 13 594A   1775 G 20130404023135770 17 25 0817156-053876 37 S
    99300 13 594A   1775 G 20130404023143138 17 25 0817938-053850 37 S
    
    Orbital fits:
    1 99301U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99301  19.3958 354.8357 7216711  34.6428  18.9453  2.00000000    01
    1 99302U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99302  19.4272 354.8689 7184817  34.1843  19.4535  2.04999995    07
    1 99303U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99303  19.4562 354.9068 7153225  33.7295  19.9632  2.10000000    06
    1 99304U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99304  19.4852 354.9443 7122406  33.2753  20.4732  2.15000000    09
    1 99305U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99305  19.5139 354.9822 7092252  32.8224  20.9836  2.20000000    08
    1 99306U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99306  19.4784 355.1562 7050030  32.4289  21.5305  2.25000000    05
    1 99307U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99307  19.5710 355.0571 7034078  31.9192  22.0052  2.30000003    09
    1 99308U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99308  19.5990 355.0949 7005948  31.4693  22.5166  2.35000001    07
    1 99309U 13594A   13094.10408140  .00000000  00000-0  00000-0 0    03
    2 99309  19.6268 355.1332 6978426  31.0204  23.0284  2.40000000    08
    
    
    
    On Thu, Apr 4, 2013 at 1:14 PM, Kevin Fetter <kfetter@yahoo.com> wrote:
    
    > What's my problem.
    >
    > Using my fake orbit orbit, for the slow moving unid seen the other night
    >
    > http://www.satobs.org//seesat/Mar-2013/0187.html
    >
    > I aimed at where it was predicted to pass, to check on it, as I was
    > working last night.
    >
    > As I played back the video, me had what looks to be a unid sat pass by. So
    > far nothing matches.
    >
    > It was around
    >
    > 8 h 05 m R.A
    > -5 h 53 m Dec
    >
    > At around 2:29 utc. There's a sat's show there, but I know it's not that
    > one.
    >
    > So unless it something else, I might have lucked out, and mr unid won't
    > escape this time. It's earlier then predicted, but that's ok to me. It also
    > moved at a faster speed, across the feild of view.
    >
    > I know, I am tired, but I really seem to be seeing a slow moving unid.
    >
    > Kevin
    >
    >
    >
    >
    >
    >
    > _______________________________________________
    > Seesat-l mailing list
    > http://mailman.satobs.org/mailman/listinfo/seesat-l
    >
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