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Roche Limit. In subject area: Physics and Astronomy. The Roche Limit is the minimum distance from a celestial body at which another body, such as a satellite or a star cluster, can orbit without being torn apart by tidal forces. AI generated definition based on: New Astronomy Reviews, 2021. About this page.
The Roche limit is not a sharp boundary; materials that are less dense or more porous can remain dispersed as a ring at the same location where denser material will accrete. Also, dense rings near the transition develop a microstructure as they try to accrete and are frustrated by tides (Section 4.1 ).
A simple estimate of the approximate bounds on the range of Roche Limits for breakup of an L chondrite asteroid at Earth (radius = 6,371,000 m; avg density = 5513 kg m-3) can be made by calculating the solid body Roche Limit using the density of L chondrites (3350 kg m-3), and the liquid body Roche Limit (approximating a cohesionless rubble ...
Jun 1, 1980 · Amalthea Assuming Amalthea's density to be 2.0 g/cm3, the relation between this small Jovian satellite and its Roche lobe, as depicted in Fig. 5, is topologically similar to that of Deimos. The format here is the same as that in Figs. 2, 3, and 4, except that the LIFE NEAR THE ROCHE LIMIT 431 Fic. 5. Zero-velocity curves for Amalthea. The ...
Roche Lobe. In subject area: Physics and Astronomy. A Roche lobe is defined as a region of space around a celestial body where the gravitational forces between two objects determine the flow of matter between them, despite the misleading term 'lobe'. AI generated definition based on: New Astronomy Reviews, 2002. About this page.
May 1, 1974 · The solid line shows the 'Roche-Limit' L = Lc, for an angular drift velocity, ~(r), de- termined by the radial component of the electric field E3. The plasmapause is the innermost equipotential surface tangent (near midnight) to the 'Roche-Limit' surface. The plasmaphere (shaded region I) is filled with nearly corotating thermal plasma held by ...
Jan 1, 1972 · Ill ROCHE C O O R D I N A T E S In the second part of this chapter we outlined the principal geometrical features characteristic of the Roche equipotentials and, in particular, of the largest closed equipotentials capable of containing their total mass, which we call the "Roche limit. ,, In Section II,B we expressed the external form of such ...
May 1, 1974 · The plasmapause position is determined by the innermost equipotential surface which is tangent to the ‘Roche-Limit’ surface of the ionospheric plasma filling the magnetosphere. When the thermal particles corotate with the Earth's angular velocity, the ‘Roche-Limit’ equatorial distance is Lc =5.78 [RE]. When the angular convection ...
By necessity, a dense ring resides inside its planet’s p0015 Roche limit, the distance from a planet within which tides can pull a moon apart. If, contrariwise, a dense ring were outside the Roche limit, it would most likely accrete into one or more moons. The Roche limit is not a sharp boundary; materials that are less dense or more porous can remain dispersed as a ring at the same location ...
Aug 1, 2006 · The Roche limit (Roche, 1847) is a well-known concept of Solar System studies: it defines a closest approach for a small body to a large one. Within that limit, the smaller body cannot withstand the tidal forces, and therefore must break up. A ring of particles within that limit cannot accumulate into a larger body. This concept is often applied to satellites of the Solar System planets, and ...
