Iridium 38 (tumbling) overtaking Iridium 39

From: Björn Gimle (b_gimle@algonet.se)
Date: Sun Oct 24 2004 - 09:17:30 EDT

  • Next message: Daniel Deak: "Fast flashers TLE, October 24"

    Iridium 38 (tumbling) has slowly (~10 s/day) overtaken Iridium 39 (Oct.20),
    which is flaring in the ESE, around RA 0h, dec +25
    (at my latitude)
    
    This could still result in interesting photographs. For good video, you may
    have to wait until it overtakes the next operational one in the same plane,
    Iridium 40 around Dec. 08
    
    Before that, it will be overtaken by Iridium 44 (tumbling) on Nov.1-2
    separating by about 90 s/day, and if you are lucky Iridium 77 in
    engineering orbit (20 min/day!), but because of their differences in
    orbit plane and altitude respectively, they will not be so closely
    tracking as Ir39 is.
    
    Iridium 39
    1 25042U 97069D   04297.14054665  .00000199  00000-0  64110-4 0  4975
    2 25042  86.3965 152.6479 0002340  84.6305 275.5153 14.34218121364111
    Iridium 38 tum
    1 25043U 97069E   04297.14022551  .00000187  00000-0  59555-4 0  5420
    2 25043  86.3965 152.5329 0002233  87.9305 272.2140 14.34392276364161
    Iridium 44 tum
    1 25078U 97077B   04295.96904494 +.00000129 +00000-0 +37532-4 0 07823
    2 25078 086.3996 151.3154 0001773 010.2016 349.9216 14.36291818360009
    Iridium 77 ?
    1 25471U 98051E   04297.39496549 -.00000472  00000-0 -11493-3 0  5760
    2 25471  86.5168 152.5395 0002409  82.2563 277.8925 14.54936162325265
    
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