RE: Fasat B tumbling

Chris Jackson (
Wed, 16 Jun 1999 11:16:26 +0100

FASAT-B is not tumbling - it is spinning around the Z axis at a 10min rate
(0.6 degr/second).  It is still 100% functional and is primarily being used
for earth imaging and ozone monitoring.

The boom is approximately 1/2 inch diameter, with a 4kg tip mass (~4 inch
diameter).  Solar panels are on the X and Y facets - it is probably these
that are flashing

The control stations for this spacecraft are in Chile and Guildford, UK.

Interesting report though...

Chris Jackson
Groundstation and Operations Manager
Surrey Satellite Technology Ltd
University of Surrey
Guildford, Surrey GU2 5HX,  UK
Ph: +44 1483 259-141
Fax: +44 1483 259-503

-----Original Message-----
From: Tristan Cools []
Sent: 16 June 1999 00:57
Subject: Fasat B tumbling


This evening I observed Fasat B(1998-43B/25395) at 2143UTC(June 15).  I
didn't expect to see it because of its small size.  It is a small box of
0.6*0.35*0.35m but with a stabilisation boom of 6m.

At best it had a magnitude of +3.5 and it was tumbling with nice smooth
flashes of about 36.8s.  
The flashes are probably caused by the stabilisation boom(which doesn't do
its job anymore I suppose).

Anyone more info on the status of this satellite ?

Tristan Cools
BWGS Member - Belgian Working Group Satellites

Observing at:

Damse Vaart: 3.2486E/51.2279N
Ryckevelde: 3.2867E/51.2054N
Brugge: 3.1611E/51.2108N