Constraints on Eros density distributions from the measured shape and gravity field.

Details Constraints on Eros density distributions from the measured shape and gravity field. Constraints on Eros density distributions from the measured shape and gravity field.

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.6513s&link_type=abstract

American Astronomical Society, DPS Meeting #32, #65.13; Bulletin of the American Astronomical Society, Vol. 32, p.1641

Statistics

Computation

Scientific paper

As part of NEAR's scientific and navigation objectives the gravitational field and shape of asteroid 433 Eros is being measured (Yeomans et al., Science 289, 2085, Miller et al., AIAA Paper 2000-4422). These data sets can be combined to generate estimates of possible density distributions within this asteroid. Results to date indicate that Eros has a very nearly uniform density distribution (Yeomans et al., this conference). Comparisons between the measured gravity field and the constant density gravity field computed from the measured shape indicate small, but statistically significant, differences over some regions of the asteroid. An algorithm that can extract least-squares estimates of density distribution within an asteroid is applied to the NEAR data set (Scheeres et al. Planetary Space Science, in press). This approach is used to constrain internal density variations, and compute the signatures that a regolith covering would have on the measured asteroid gravity field. Comparisons between these computations and the NEAR data are presented.

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