AO-73 : Funcube-1

Rotation Period

25 Sep 2020 = 16.0 seconds (from averaged panel temperatures)
26 Sep 2020 = 15.5 seconds (from averaged panel temperatures)
27 Sep 2020 = 15.8 seconds (from averaged panel temperatures)
28 Sep 2020 = 16.9 seconds (from averaged panel temperatures)
29 Sep 2020 = 18.6 seconds (from averaged panel temperatures)
30 Sep 2020 = 22.7 seconds (from averaged panel temperatures)
01 Oct 2020 = 25.3 seconds (from averaged panel temperatures)

During this last week on some of the downloads over VK we have observed the Dzhanibekov Effect where the spin motion of AO-73 has reversed back and forth during a single pass. Additionally the spin motion has been either normal or reversed on consecutive passes.
AO-73 is now exhibiting a very complex attitude and motion, refer graphic below.

73 de Colin VK5HI

AO-73 : Funcube-1

Rotation Period

18 Sep 2020 = 20.4 seconds (from averaged panel temperatures)
19 Sep 2020 = 20.0 seconds (from averaged panel temperatures)
20 Sep 2020 = 20.0 seconds (from averaged panel temperatures)
21 Sep 2020 = 19.2 seconds (from averaged panel temperatures)
22 Sep 2020 = 18.7 seconds (from averaged panel temperatures)
23 Sep 2020 = 17.9 seconds (from averaged panel temperatures)
24 Sep 2020 = 16.8 seconds (from averaged panel temperatures)

AO-73 is now spinning about Z-Z axis with significant levels of Nutation.
73 de Colin VK5HI.

AO-73 : Funcube-1

Rotation Period

11 Sep 2020 = 31.5 seconds (from averaged panel temperatures)
12 Sep 2020 = 30.6 seconds (from averaged panel temperatures)
13 Sep 2020 = 27.6 seconds (from averaged panel temperatures)
14 Sep 2020 = 25.8 seconds (from averaged panel temperatures)
15 Sep 2020 = 24.3 seconds (from averaged panel temperatures)
16 Sep 2020 = 22.7 seconds (from averaged panel temperatures)
17 Sep 2020 = 21.6 seconds (from averaged panel temperatures)

AO-73 is now in full sun until April 13th 2021.
Satellite is now spinning about Z-Z axis with significant levels of Nutation.
73 de Colin VK5HI.