Acceleration Report : 2 Dec '96 : 92- 8 B, 92- 20 B, 92- 30 J

Kurt Jonckheere (kjonckheere@unicall.be)
Mon, 2 Dec 1996 23:38:48 +0100

You can find the updated version of this Acceleration report via : http://uc2.unicall.be/kjonckheere/index.htm
***************************************************************************
Observations of the following objects are needed very urgently :

The following objects had a jump in Mean Motion and * MIGHT * accelerate:
21938 = 92- 20 B              

The following objects had a jump in Mean Motion and ARE ACCELERATING !
21876 = 92-  8 B           21984 = 92- 30 J 

---------------------------------------------------------------------------

21876 = 92-  8 B 
Evolution of the Flash Period of this rocket : 
92-  8 B 96-10-23 05:07:35   LB  180.3 0.2  10 18.03  FF, mag 4->inv
92-  8 B 96-10-23 18:44      WV                       S ??
92-  8 B 96-10-25 17:55:18   LB   74.5 0.2   4 18.6   FF, mag 4->inv
92-  8 B 96-11-06 18:10      KJ  155.4 1.5   8 19.4   FF, 4->inv, later MM
92-  8 B 96-11-15 17:04      KJ  179.0 0.4  14 12.79
Ron Lee also saw it flashing at 96-11-18 but couldn't measure a good period
because of changing Flash behaviour of this rocket.

For the moment this object is only visible for our Southern latitude
observers.  Who of them makes the next observation ?
Latest elements : 
1 21876U 92008B   96331.18224087  .00000379  00000-0  38214-3 0  7726
2 21876  82.9254 293.6642 0037026  97.1831 263.3513 13.74517050239443

----------------
21938 = 92- 20 B 
No observations have been reported yet.
Latest elements : 
1 21938U 92020B   96334.07556020 +.00000761 +00000-0 +78748-3 0 07799
2 21938 082.9286 169.4568 0029200 243.6555 116.1604 13.74394179231960
This object is also visible for Northern latitude observers although
in the morning hours.

----------------
21984 = 92- 30 J 
During August '96 there was a very sudden increase of the SMA of about
150 m.  Now, the SMA has been going up rather fast again since 15 November.
Latest elements : 
1 21984U 92030J   96334.55220375 -.00000003  00000-0  10000-3 0  6560
2 21984  74.0029   0.2011 0122906  88.9516 272.5547 12.22113270200420

Evolution of the Flash Period of this rocket : 
92- 30 J 96-06-15 00:29:03   LB   81.2 0.2   6 13.53  AA, mag 3->inv
92- 30 J 96-06-15 21:59:47   LB   54.2 0.2   4 13.5   FF, mag 4->inv
92- 30 J 96-06-15 22:00      KD  149.8 1.0  11 13.6
92- 30 J 96-06-15 22:00      KJ  217.4 0.5  16 13.59
92- 30 J 96-06-15 22:00      TC  108.2 0.2   8 13.52  FF, mag +4
92- 30 J 96-07-17 22:20:04   LB   86.9 0.2   6 14.48  FF, mag 5->inv
92- 30 J 96-07-18 00:27:24   LB  258.9 0.1  26  9.958 FF, mag 5->inv
92- 30 J 96-07-23 00:10:58   LB  149.7 0.5  10 15.0   AA, mag 4->inv
92- 30 J 96-07-26 22:26:10   LB   89.2 0.5   6 14.9   AA, mag 5->inv
92- 30 J 96-08-19 20:10:57   LB   98.1 0.2  12  8.18  FF, mag 6->inv
92- 30 J 96-08-21 03:39      PM   56.3       7  8.0
92- 30 J 96-08-22 20:54:02.9 KJ  278.5 0.5  34  8.19  dra
92- 30 J 96-09-02 20:06:00   LB   98.8 0.2  10  9.88  FF, mag 7->inv
92- 30 J 96-09-04 03:35      JEV 153.0 0.2  18  8.50  FF
92- 30 J 96-12-02 02:19      RGL 122.5 0.8  10 12.25  FF, mag 4->inv
On the web pages you can see the evolution of the Flash Period.

This shows that it is very probable that the observations of 
8-9 seconds do not correspond with an acceleration at the end 
of August as I will explain.  
Following the changing observer-satellite angle it is possible 
that on certain passes, an observer measures half the period 
of the previous seen Flash Period.  These observations indeed 
lay in the "half-belf"  and when we double these observations 
this let us conclude that there was no acceleration.

The latest observation of Ron Lee cannot be changed in the same why.
It does not fit in the half belt.  

Who will make the next observation to confirm the 
possible acceleration Ron observed ?

Thanks a lot to Ron for making this observations only some hours
after my mail to SeeSat-L and the setup of this pages ! 

 There is no excuse not to observe this object.  It is not only visible
 where Ron lives...  For Northern latitude it is currently visible in the
 morning, but will become visible in the evening within some days.


Happy observing !

-------------------------------------------------------------------------
       Kurt Jonckheere (kjonckheere@unicall.be)  51.2 N  2.9 E   
  Latest accelerations : http://uc2.unicall.be/kjonckheere/index.htm 
    observations collector for the Belgian Working Group Satellites: 
Send your observations of flashing satellites, preferrably in the correct
     PPAS format to obs@physics.oxford.ac.uk or obs@physics.ox.ac.uk
-------------------------------------------------------------------------