Spin Barrier for Rubble-Pile Asteroids: Critical Period as a Function of Bulk Density and Cohesion

This paper computes the critical spin period of rubble-pile asteroids, the density implied by the observed 2.2 hour barrier, and the size of any torsion correction The headline results from the deposited calculation are: P_at_2000 = 2.33; P_at_1200 = 3.01; rho_for_2p2h = 2251; P_at_2700 = 2.01. the critical spin period of rubble-pile asteroids, the density implied by the observed 2.2 hour barrier, and the size of any torsion correction is examined against published small-body observations, and the size of any correction associated with a torsion-type density bound near 9.7 x 10^57 kilograms per cubic metre is evaluated explicitly; at small-body densities that correction is smaller than the classical quantities by more than fifty orders of magnitude and changes no result at the quoted precision. This study is simulated and computed from stated assumptions; it is not a measurement.