NASA NTRS · 19660014422
Cassinis second and third laws of moons rotational motion extended and applied to earth satellite, Mercyry, and Iapetus
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Colombo, G.. 1966-03-04. Cassini's second and third laws. https://ntrs.nasa.gov/citations/19660014422
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Proper rotations of three-dimensional orthogonal frame
Radar observations of Mercury have disclosed that the sidereal period of the planet's axial rotation is 59 + 3 days (Pettengill and Dyce, 1965; Dyce et al., 1966), rather than the previously accepted period of 88 days (see, for example, Dollfus, 1953). The purpose of our investigation is to discover the implications for our theories of the solar system (and of the inner planets in particular) which this new result may require.
Rotational temperatures measured in static low density air with electron beam probe