Tumble rate of NROL-101 Centaur upper stage is increasing

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 7 Dec 2020 23:11:10 +0100
Hi all,

The tumble rate of 2020-083B, the Centaur upper stage from the NROL-101 launch,
is indeed increasing.

Where I measured a peak-to-peak period of 138.02 seconds on Nov 22, my new data
from December 4th covering six brightness peaks yield a peak-to-peak period of
114.13 seconds, suggesting an increase of about 2 seconds/day.

Brightness variation profile from the Dec 4 video data:

https://twitter.com/Marco_Langbroek/status/1336069179666034688?s=20

- Marco


-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Station (b)log: http://sattrackcam.blogspot.com
Launchtower:  http://launchtower.langbroek.org
Twitter: _at_Marco_Langbroek
-----

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Received on Mon Dec 07 2020 - 16:11:57 UTC

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