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Astrophysics > Earth and Planetary Astrophysics

arXiv:2411.09247 (astro-ph)
[Submitted on 14 Nov 2024]

Title:Spontaneous rotation of a nanosatellite FITSAT-1

Authors:Y. Kawamura, T. Tanaka
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Abstract:Spontaneous rotation of an ultra-small satellite was observed and its driving torque was explained by the thermal interaction between the air molecules and the surfaces of the satellite heated by the radiation from the earth. This mechanism has the similarity with a usual radiometer, except the point that the velocity of the satellite is sufficiently faster than that of the thermal velocity of the air molecules, and that the mean free path of the air molecules is sufficiently longer than the characteristic length of the satellite. Using dimension analysis, the torque was found to be significant to a small size of satellite. This rotation mechanism can be applied to any small objects, which are revolting around a planet radiating a black body radiation and has the atmospheric gas.
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM)
Cite as: arXiv:2411.09247 [astro-ph.EP]
  (or arXiv:2411.09247v1 [astro-ph.EP] for this version)
  https://doi.org/10.48550/arXiv.2411.09247

Submission history

From: Yoshiyuki Kawamura [view email]
[v1] Thu, 14 Nov 2024 07:25:18 UTC (330 KB)
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