More about the moment of inertia of Mars
Abstract
The maximum allowable mean moment-of-inertia I of Mars is 0.3650 · MR² because the rate-of-adjustment of the rotation axis is much faster than the rate-of-generation of density heterogeneities, as with any planet. But Mars differs from the other terrestrial planets in that its gravity field is rougher, in the sense of stress-difference implication, and its global tectonics is dominated by one feature, centered on the Tharsis Plateau. Plausible tectonic models of Mars require generation and support that are almost axially symmetric about Tharsis. Hence, unlike other terrestrial planets, Mars likely has two non-hydrostatic components of moments-of-inertia that are nearly equal, and the most probable value of I/MR² is slightly less than 0.3650.
- Publication:
-
Geophysical Research Letters
- Pub Date:
- November 1989
- DOI:
- 10.1029/GL016i011p01333
- Bibcode:
- 1989GeoRL..16.1333K
- Keywords:
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- Mars (Planet);
- Moments Of Inertia;
- Planetary Rotation;
- Terrestrial Planets;
- Gravitational Fields;
- Planetary Composition;
- Planetary Surfaces;
- Tectonics;
- Planetology: Solid Surface Planets and Satellites: Orbital and rotational dynamics;
- Planetology: Solid Surface Planets and Satellites: Composition;
- Planetology: Solid Surface Planets and Satellites: Gravitational fields;
- Planetology: Solid Surface Planets and Satellites: Interiors;
- Planetology: Solid Surface Planets and Satellites: Tectonics