Mercury's rotation axis and period

Details Mercury's rotation axis and period Mercury's rotation axis and period

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...28..469k&link_type=abstract

Icarus, vol. 28, Aug. 1976, p. 469-478.

Mathematics

Probability

8

Axes Of Rotation, Mercury (Planet), Planetary Rotation, Error Analysis, Mariner 10 Space Probe, Planetology

Scientific paper

Recent measurements made from high-resolution Mariner 10 photography of the planet Mercury yield a rotation period of 58.6461 + or 0.005 days, in excellent agreement with the period required for a precise 2/3 resonance with its orbital period (58.6462 days). The axis of rotation of the planet was calculated to be offset about 2 deg from the perpendicular to its orbital plane within a 50% probability error ellipse of + or - 2.6 deg by + or - 6.5 deg. Dynamical considerations make it most likely that the true displacement from the orbit normal is less than 1 deg.

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