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These comet nuclei are usealy small prolate ellipsoids of low albedo. The axis ratios range
between 1.1,2.6 which when combined with rotation periods constrains the density lower limits.
nuclei are found to have very small fractional active spotes. There isn’t very much evidence that has been seen, however, the results to date suggest a strengthless agglomeration ofgravitationally bound planetesimals with a bulk density between 0.5