Raduga 27 = 91- 14 A = 21132 overview

From: Kurt Jonckheere (kjon@yucom.be)
Date: Wed Jan 15 2003 - 15:12:56 EST

  • Next message: Alan Pickup: "Decay watch: 2003 January 15"

    Raduga 27 = 91- 14 A = 21132
    Hello all,
    on the BWGS web pages Tristan put a graph of the evolution of the 
    flashing period of this Raduga during 1999 and 2000 (PPAS 10).  
    see :
    This object is drifting around the earth very slowly, 
    it takes about 15 years or so to go around...
    Just like the three Gorizont on the page, this one has also periodical
    flashing period changes : accelerating and slowing down again.
    Although Radugas look pretty similar as Gorizonts (cylinder with some 
    symmetrical extended solar arrays), the acceleration of Raduga 27 seems
    NOT to be linked with the sun :
      Observations of the last month by Leo and me even confirm that the 
    changes are not seasonally linked.  
    Because this object wasn't observed regularly between 2000 and now, 
    it is not clear what the real period of the periodical variations is.
    During the same period three years ago, the rotation was slowing down, 
    but currently it is accelerating pretty fast (roughly the period 
    goes down linearly 0.1 second a day).
    Currently it is flashing brighter than +7 from Belgium/The Netherlands
    (and probably from other places over Europe/Africa) somewhere between 
    18h30m and 21h30 UT.  Bjoern tried during the same time but didn't saw 
    anything bright.  
    02-12-26 21:40 KJ  70.1 (only three flashes seen, clouds)
    03-01-04 21:14 KJ  69.33
    03-01-04 21:23 LB  69.34
    03-01-08 19;24 KJ  68.91
    03-01-08 20:10 KJ  68.91
    03-01-08 20:36 LB  68.91  
    03-01-10 20:18 LB  68.67  
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