NASA NTRS · 19840053934
Hyperion - 13-day rotation from Voyager data
Abstract
The rotation period of Hyperion is determined here on the basis of a light-curve derived from low-resolution Voyager images taken over a two-month span. The data indicate a coherent 13-day spin period over 61 days, with the spin axis nearly parallel to the orbital plane. Since Hyperion is not in synchronous rotation, it cannot be used to test the hypothesis that dark dust spiralling inward on retrograde orbits causes the pronounced leading side/trailing side albedo asymmetry observed on the surface of Iapetus.
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Thomas, P., Veverka, J., Wenkert, D., Danielson, G. E., Davies, M. E.. 1984-02-23. Hyperion - 13-day rotation from Voyager data. https://ntrs.nasa.gov/citations/19840053934
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