Acceleration Report : 16 May 96: 87- 60 A and 96- 17 B

Kurt Jonckheere (kjonckheere@unicall.be)
Thu, 16 May 1996 16:55:34 +0000

The following objects HAVE accelerated!
87- 60 A =3D 18187 and 96- 17 B  =20
---------------------------------------
Tristan and I had a good observing session tonight.
Some results in this report:

87- 60 A =3D 18187 =3D Cosmos 1867
93-06-29 LB         almost S, mag 5  =20
93-10-17 TC         S, mag +2.5, u   =20
94-05-11 TC         S, mag +6.5      =20
96-05-15 KJ   8.0                    =20
96-05-15 TC   8.30  AA, mag +3       =20
Started flashing!! ; See TC's message.

87- 98 B =3D 18586
96-02-01 LB  20.25  AA, mag 5->7     =20
96-02-21 LB  16.5   AA, mag 4->inv   =20
96-04-03 JVS 18.0                    =20
96-04-03 WV  17.8                    =20
96-04-17 WN  17.1   M'M', C* 1898 r, m
96-04-27 LB  17.0   AA, mag 4->inv   =20
96-04-30 BD  16.2   4.5->inv; drap   =20
96-05-04 KJ  17     long max,diff per,
96-05-15 TC  18.0   ssm, mag +4      =20
96-05-15 KJ  18.1                    =20
The acceleration of this rocket seems to be halted.

89- 28 B =3D 19922
95-08-23 WN  39     C* 2016 r, F'F'  =20
95-11-08 MM  39.0   4-8, sm flsh to 3=20
95-11-14 MM  37     4-6.5, sm        =20
96-02-21 JVS 30     M'M'             =20
96-04-26 KJ  13.17                   =20
96-04-27 KJ  13.1                    =20
96-05-04 KJ  13.55                   =20
96-05-05 LB  13.4   AA, mag 4->inv   =20
96-05-08 LB  13.6   AA, mag 5->inv   =20
96-05-15 KJ  14.1                    =20
Accelerated somewhere at the beginning of '96, but is already       =20
going up again.

89- 59 B =3D 20150
95-04-04 RO  180    mag 7->10        =20
95-04-12 RO         S                =20
95-12-01 WV         LP +6-inv        =20
96-04-28 KJ  68     mag +3->inv      =20
96-05-15 KJ  79                      =20
Although this one had a jump in Mean Motion some time ago, it
is NOT accelerating.

90-  4 B =3D 20433
96-04-30 BD  13.3   5.5->inv         =20
96-05-05 BD  13.3   5.5->8           =20
96-05-15 KJ  13.83                   =20
96-05-15 TC  13.9   sm, mag +3=7F      =20
Acceleration has finished.       =20

91- 59 B=20
96-02-10 WN  15                      =20
96-02-12 MM  12.5                    =20
96-02-18 LB   9.23  AA, mag 4->7     =20
96-02-23 LB   9.42  AA, mag 4->inv   =20
96-02-24 LB   9.45  AA, mag 4->inv   =20
96-04-13 KJ  11.3                    =20
96-04-21 TC  11.7   together with 91-5
96-04-21 TC  11.7   together with 91-5
96-04-22 BD   7.0   5.5->inv; a'F'a'F'
96-04-26 WV         S  East          =20
To be observed as soon as possible!       =20

-------------------------------------------------
96- 17 B =3D 23828
A week ago I wrote about this fourth stage IRS P3 :
>Between it has been put into orbit and the beginning of May, the semi-
>major axis remained nearly constant at 7202.62 km.
>Since May 2, the semi-major axis started to decrease suddenly:
>96 May 2 : 7202.62 km
>96 May 6 : 7202.57
>96 May 7 : 7202.52
>96 May 8 : 7202.46
>96 May 9 : 7202.41
>96 May 10: 7202.38

Because the observations around May 10 didn't show a nice flasher, I decided
that it was not accelerating.  But last night we were able to observe it=20
again.  At the beginning it was slowly varying with a small amplitude but
later on the flashes became more distinct.
96-04-26 WV         S +6             =20
96-04-27 TC         S or lp, mag +5.5=20
96-05-05 LB         S, mag 5         =20
96-05-08 LB  50     dtm, mag 6->7    =20
96-05-12 JEV 100    P>100?, mag+6->inv
96-05-15 KJ  16.0   first sa, later FF
96-05-15 TC  14.4   sa, mag +4.5     =20
       =20
96- 17 B 96-05-15 21:51      KJ  191.9 1.0  12 16.0   first sa, later FF
96- 17 B 96-05-15 21:52      TC  115.3 0.5   8 14.4   sa, mag +4.5
My timings were:=20
15.9(1)=20
32.8(2)=20
49.6(3)
64.5(4)
81.9(5)=20
97.8(6)
114.7(7)   this coincides with the 115.3 of Tristan I think
128.8(8)=20
147(9)
160(10)=20
169.6(11)=20
179.7(12)
According to my timings I think Tristan missed one flash and his period
has to be 115.3 / 7 =3D 16.5 seconds.

It seems that it can take some time after the Jump in Mean Motion (May 4=
 +-2)
for the acceleration to become visible.  This is an ideal opportunity to=20
observe how long the acceleration will continue. =20

So all observers should focus on this object!
23828
1 23828U 96017B   96136.26621904  .00000287  00000-0  15363-3 0   305
2 23828  98.7930 211.3651 0034622  96.4556 264.0556 14.20314552  7813

Happy observing,

Kurt J