Superbird = 20040 = 89- 41 A

Kurt Jonckheere (kjon@mail.dma.be)
Sat, 13 Feb 99 22:10:37 PST

hello,

just before some clouds moved in this evening (Feb 13) I observed
Superbird = 89- 41 A = 20040 for about 8 minutes (till 18h14m UT). 
It was flashing with maxima between +8 and +10 or so.  The average time
between the flashes was 23.147 +- 0.01 seconds.

At Jan 29 I measured a period of 23.120 so the period seems to be going
up slowly again after the rotation accelerated a little bit on its way 
between America and Europe :

> Rob Matson:
> 89- 41 A 98-09-30 03:25:32.6 RM                23.127 23.12737 +/- .00005
> 89- 41 A 98-11-05 04:16:48.3 RM  219.9 0.1     23.149 N=9.5, mag +3->inv
> 29 Jan 1999 :  23.120 (+- 0.002) seconds.

regards,

Kurt Jonckheere (kjon@mail.dma.be)

Please send your observations of flashing satellites to :
ppas@lists.satellite.eu.org.