The chronostratigraphy of protoplanet Vesta
نویسندگان
چکیده
منابع مشابه
The chronostratigraphy of protoplanet Vesta
In this paper we present a time-stratigraphic scheme and geologic time scale for the protoplanet Vesta, based on global geologic mapping and other analyses of NASA Dawn spacecraft data, complemented by insights gained from laboratory studies of howardite–eucrite–diogenite (HED) meteorites and geophysical modeling. On the basis of prominent impact structures and their associated deposits, we pro...
متن کاملThe Geology of Vesta
The Dawn spacecraft collected over 28,000 images and a wealth of spectral data of Vesta’s surface. These data enable analysis of Vesta’s diverse geology including impact craters of all sizes and unusual shapes, a variety of ejecta blankets, large troughs, impact basins, enigmatic dark material, and considerable evidence for mass wasting and surface alteration processes [1,2,3]. Two large impact...
متن کاملProtoplanet Magnetosphere Interactions
Aims. In this paper, we study a simple model of an orbiting protoplanet in a central magnetospheric cavity, the entry into such a cavity having been proposed as a mechanism for halting inward orbital migration. Methods. We have calculated the gravitational interaction of the protoplanet with the magnetosphere using a local model and determined the rate of evolution of the orbit. Results. The in...
متن کاملThe rotational motion of Vesta
Context. Vesta is the second largest body of the main asteroid belt, and it has been studied recently in great detail by the Dawn mission. It was the first time that this asteroid, or protoplanet, has been explored by a space mission, and it revealed a differentiated body. The knowledge of the rotational motion and, especially, its precession-nutation and length-of-day variations may add precio...
متن کاملGeologic mapping of Vesta
We report on a preliminary global geologic map of Vesta, based on data from the Dawn spacecraft’s HighAltitude Mapping Orbit (HAMO) and informed by Low-Altitude Mapping Orbit (LAMO) data. This map is part of an iterative mapping effort; the geologic map has been refined with each improvement in resolution. Vesta has a heavily-cratered surface, with large craters evident in numerous locations. T...
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ژورنال
عنوان ژورنال: Icarus
سال: 2014
ISSN: 0019-1035
DOI: 10.1016/j.icarus.2014.06.027