Recent unknowns: Essaim?

From: C. Bassa (cgbsat@gmail.com)
Date: Tue Oct 15 2013 - 08:04:15 UTC

  • Next message: Kevin Fetter: "Nice suprose from Delta 1 r/b = it got very bright for a few seconds video"

    Kevin and I observed three unknowns that may belong to objects from
    the Essaim quartet. Essaim 3 [28496/04049E] and Essaim 4
    [28497/04049F] were observed briefly at the beginning of the year
    while Essaim 1 [28494/04049C] and Essaim 2 [28495/04049D] have not
    been seen (or identified as such) since the beginning of 2010.
    
    All three objects appear to be equally bright and quite variable and
    compare to what was seen of Essaim 3 and 4 from the beginning of the
    year. Ted Molczan provided search orbits in February and these compare
    reasonably well with the circular orbits I estimate from the
    observations below.
    
    Kevin already mentioned he reobserved object 99218, and since we are
    early in the visibility season of these types of orbits we may be able
    to find and track all four Essaim objects for a few months.
    
    Regards,
        Cees
    
    Object 99072 (http://www.satobs.org/seesat/Oct-2013/0057.html)
    99072 13 778A   4171 G 20131005182229027 17 25 0033232+344991 37 S
    99072 13 778A   4171 G 20131005182232427 17 25 0037469+360437 37 S
    99072 13 778A   4171 G 20131005182235527 17 25 0041484+371422 37 S
    99072 13 778A   4171 G 20131005195806713 17 25 1755141+055319 37 I
    
    Object 99218 (http://www.satobs.org/seesat/Oct-2013/0117.html but longer video)
    99218 13 785A   1775 G 20131012003332827 17 25 1926088-113073 37 I
    99218 13 785A   1775 G 20131012003335881 17 25 1924171-104276 37 I
    99218 13 785A   1775 G 20131012003340485 17 25 1921182-092808 37 I
    99218 13 785A   1775 G 20131012003343905 17 25 1918907-083121 37 I
    99218 13 785A   1775 G 20131012003348092 17 25 1916029-071898 37 I
    99218 13 785A   1775 G 20131012003356301 17 25 1910089-045136 37 I
    99218 13 785A   1775 G 20131012003400088 17 25 1907254-033982 37 I
    99218 13 785A   1775 G 20131012003408330 17 25 1900671-005734 37 I
    99218 13 785A   1775 G 20131012003412650 17 25 1857073+003114 37 I
    99218 13 785A   1775 G 20131012003416187 17 25 1853970+014562 37 I
    99218 13 785A   1775 G 20131012003420258 17 25 1850342+031330 37 I
    99218 13 785A   1775 G 20131012003424079 17 25 1846849+043767 37 I
    99218 13 785A   1775 G 20131012003427833 17 25 1843276+060226 37 I
    99218 13 785A   1775 G 20131012003436357 17 25 1834686+092047 37 I
    99218 13 785A   1775 G 20131012003444215 17 25 1826264+122969 37 I
    Tom Laskowski observation (http://www.satobs.org/seesat/Oct-2013/0126.html)
    99218 13 785A   0000 G 20131014011530000 28 25 1739040+372906 28 I
    
    Object 99219 (http://www.satobs.org/seesat/Oct-2013/0134.html)
    99219 13 788A   1775 G 20131015001709765 17 25 1809618+090531 37 I
    99219 13 788A   1775 G 20131015001710700 17 25 1808636+092603 37 I
    99219 13 788A   1775 G 20131015001711650 17 25 1807616+094709 37 I
    99219 13 788A   1775 G 20131015001712468 17 25 1806738+100550 37 I
    
    Circular orbit estimates:
    1 99072U 13778A   13278.76565135  .00000000  00000-0  50000-4 0    04
    2 99072  98.9016 319.0411 0010000   2.6510  51.8189 14.83092586    04
    1 99218U 13785A   13285.02370973  .00000000  00000-0  50000-4 0    05
    2 99218  98.3578 315.6920 0001000  12.9831  26.9644 14.79979595    08
    1 99219U 13788A   13288.01193422  .00000000  00000-0  50000-4 0    03
    2 99219  98.9078 313.8020 0001000   8.0684  33.7628 14.78712779    09
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