Iridiums 51 "?" and 5; Molniya 3-42 change

From: Ed Cannon (ecannon@mail.utexas.edu)
Date: Sat Dec 01 2001 - 03:29:50 EST

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    Early Saturday Dec 1 Iridium 51 "?" (25262, 98-018A) and Iridium 5 
    (24795, 97-020D) both flared pretty nearly as predicted by Iridflar.  
    Both were low in the south and quite long-lasting flares.  Has the 
    identity ambiguity between them been settled?  Rod Sladen wrote 
    about it:
    
     http://www.rod.sladen.org.uk/iridium5and51.htm
    
    Molniya 3-42 (22178).  After a couple of more observations with 
    some alternating brightness at the beginning of its visibility, 
    I've decided that its period is 24.nn instead of 12.nn.  It may do
    a phase shift, but I'm not sure about that yet.  Its flash period
    seems to have accelerated from 24.34 to 24.11 seconds in just a 
    few days:
    
    92- 67 A 01-12-01 03:48:52   EC  482.3 0.3  20 24.11  +3.0->inv, 2ndaries
    92- 67 A 01-11-25 04:14:09   EC  572.0 0.5  47 12.17  +3.0->inv
    
    In spite of the full Moon, Molniya 3-42 did quite a few one-power 
    flashes, but I was not able to see Superbird A this time without 
    binoculars.  
    
    Ed Cannon - ecannon@mail.utexas.edu - Austin, Texas, USA
    
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