Re: Nadezhda 6 twin pass /w tumbling booster

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Thu Aug 24 2000 - 23:11:36 PDT

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    > Nadezhda 6 (26384/00033A) gave a wonderful surprise performance this
    > morning (Thursday, 4:14MEST = 2:14UTC) when it passed together with its
    > tumbling SL-08 booster (26387/00033D) through Perseus, a mere 2 or 3
    degree
    ...
    > 1.) The orbits of these two don't look particularly similar to me. Are
    such
    > twin passes common for these objects? If not, I can only suggest to take
    > the opportunity and watch them. Quite a sight.
    
    Since the orbits' Mean Motion differ by less than 0.02, they will drift
    apart by less than 2 min/day, and meet again in little over 50 days.
    
    Hera are the most recent elsets from OIG:
    NADEZHDA
    1 26384U 00033A   00236.93175982 +.00001275 +00000-0 +27835-3 0 00303
    2 26384 098.1296 189.5262 0017420 184.6871 175.4117 14.59402191008237
    SL-8 R/B
    1 26387U 00033D   00236.93189387 +.00001076 +00000-0 +22729-3 0 00441
    2 26387 098.1344 189.7122 0025645 195.7709 164.2695 14.61157387008258
    
    I obtained the latest 5 elsets for 26384-26387 and ran Rob Matson's
    AllCola on them. It showed the minimum separation 11.2 km (mainly
    vertical) at 8/24/2000  1:12:58.44
    26387 should overtake all three objects within two months, but AllCola
    didn't converge. 26386 has a negative drag, so its predictions are
    unreliable. Here are the ones I/it found :
    
            26384        26385        26386        26387
    26384     -                       Oct.25       Aug.24
    26385                  -          Nov.27
    26386                               -          Sep.04
    26387                             Oct.22         -
    
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