243 Ida weighs in

Geology of 243 Ida

greater than the 1 : 5 ratios common on other rocky bodies. Contributing causes include rim degradation by whole-body The surface of 243 Ida is dominated by the effects of impacts. ‘‘ringing,’’ relatively thin ejecta blankets around crater rims, No complex crater morphologies are observed. A complete or an extended strength gradient in near-surface materials due range of crater degradation stat...

First images of asteroid 243 ida.

The first images of the asteroid 243 Ida from Galileo show an irregular object measuring 56-kilometers by 24 kilometers by 21 kilometers. Its surface is rich in geologic features, including systems of grooves, blocks, chutes, albedo features, crater chains, and a full range of crater morphologies. The largest blocks may be distributed nonuniformly across the surface; lineaments and dark-floored...

Erosion and Ejecta Reaccretion on 243 Ida and Its Moon

Using a realistic model for the shape of Ida (P. Thomas, J. Veverka, B. Carcich, M. J. S. Belton, R. Sullivan, and M. Galileo images of Asteroid 243 Ida and its satellite Dactyl Davies 1996, Icarus 120, 000–000), we find that an extensive show surfaces which are dominantly shaped by impact cratercolor/albedo unit which dominates the northern and western ing. A number of observations suggest tha...

Ejecta Blocks on 243 Ida and on Other Asteroids

Proteomics: The Nucleolus Weighs In

Numerous studies have indicated that the nucleolus is involved in a variety of cellular processes besides its well-known function in ribosome biosynthesis. A recent study describing the nucleolar proteome opens the way to new avenues of research on this important nuclear suborganelle.