UNID 0714 + 0715

From: Björn Gimle (b_gimle@algonet.se)
Date: Fri Jul 16 2004 - 16:43:52 EDT

  • Next message: Kevin Fetter: "Re: cosmos 1428 appear to be slowly rotating"

    On July 14 at 23:30 UTC, observing at Malma, site 5919, I happened to
    see a brilliantly flaring satellite slowly descending in the SSE.
    I estimated the magnitude as about -5, and it stayed negative
    for almost two minutes, despite the low altitude and long range.
    
    90309 04 696A   5919 P 20040714233016000 57 25 2141000+094800 68 S-030 15
    90309 04 696A   5919 P 20040714233100000 17 25 2153000+031200 39 S
    90309 04 696A   5919 P 20040715230746000 17 25 2158000-005100 19 S+010 15
    90309 04 696A   5919 P 20040715230826000 17 25 2207000-070000 39 S
    
    What these numbers mean: http://www.satobs.org/position/IODformat.html
    
    Ted suggested a lost, decaying Cosmos in a Molniya-type orbit.
    I tried to extrapolate its elements, and adjust it to fit roughly
    (ELCOR wouldn't converge to a reasonable elset)
    COSMOS 1030                                      4873 x 103
    1 11015U 78083A   04196.63800000  .06295901  10000-2  10000-2 0  8880
    2 11015  62.1762 159.0319 2690000 200.3045 136.9991 10.16000000090489
    (ndot2 is a pure guess, so it may be +- 40 min in error ?)
    but it descends about 20 degrees too far south, and not steep enough
    I estimated its DIR of motion as 185-190 degrees near eps Peg.
    
    I can't try to see it again tonight, because I am clouded out.
    
    /Björn
    
    -- COSPAR 5919, MALMA,    59.2576 N, 18.6172 E, 23 m         --
    -- COSPAR 5918, HAMMARBY, 59.2985 N, 18.1045 E, 44 m         --
    
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