The Geologically Recent Giant Impact Basins at Vesta’s South Pole

@article{Schenk2012TheGR,
  title={The Geologically Recent Giant Impact Basins at Vesta’s South Pole},
  author={P. Schenk and D. O'Brien and S. Marchi and R. Gaskell and F. Preusker and T. Roatsch and R. Jaumann and D. Buczkowski and T. McCord and H. Mcsween and D. Williams and A. Yingst and C. Raymond and C. Russell},
  journal={Science},
  year={2012},
  volume={336},
  pages={694 - 697}
}
A New Dawn Since 17 July 2011, NASA's spacecraft Dawn has been orbiting the asteroid Vesta—the second most massive and the third largest asteroid in the solar system (see the cover). Russell et al. (p. 684) use Dawn's observations to confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation; Vesta is also confirmed as the source of the howardite-eucrite-diogenite (HED) meteorites… Expand
The Violent Collisional History of Asteroid 4 Vesta
TLDR
Dawn observations confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation, and presents the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Dawn at Vesta: Testing the Protoplanetary Paradigm
TLDR
Dawn's results confirm predictions that Vesta differentiated and support its identification as the parent body of the HEDs, and present the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Color and Albedo Heterogeneity of Vesta from Dawn
TLDR
Dawn's observations confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation, and reveal its color and photometric diversity are indicative of its status as a preserved, differentiated protoplanet. Expand
Spectroscopic Characterization of Mineralogy and Its Diversity Across Vesta
TLDR
The mineralogy of Vesta, based on data obtained by the Dawn spacecraft’s visible and infrared spectrometer, is consistent with howardite-eucrite-diogenite meteorites, which suggests a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Dawn completes its mission at 4 Vesta
The Dawn mission was designed to test our hypothesis about the origin and evolution of the early solar system by visiting the largest differentiated basaltic asteroid, 4 Vesta, believed to be aExpand
Asteroid (4) Vesta II: Exploring a geologically and geochemically complex world with the Dawn Mission
Abstract More than 200 years after its discovery, asteroid (4) Vesta is thought to be the parent body for the howardite, eucrite and diogenite (HED) meteorites. The Dawn spacecraft spent ∼14 monthsExpand
The structure of the asteroid 4 Vesta as revealed by models of planet-scale collisions
TLDR
Three-dimensional simulations of Vesta’s global evolution under two overlapping planet-scale collisions closely reproduce its observed shape, and provide maps of impact excavation and ejecta deposition. Expand
Elemental Mapping by Dawn Reveals Exogenic H in Vesta’s Regolith
TLDR
Analysis of data from the Dawn spacecraft implies that asteroid Vesta is rich in volatiles, and models of Vesta’s evolution based on studies of howardite, eucrite, and diogenite meteorites are tested, finding that global Fe/O and Fe/Si ratios are consistent with HED compositions. Expand
Geologic Mapping of Vesta
Abstract We report on a preliminary global geologic map of Vesta, based on data from the Dawn spacecraft’s High-Altitude Mapping Orbit (HAMO) and informed by Low-Altitude Mapping Orbit (LAMO) data.Expand
Small crater populations on Vesta
Abstract The NASA Dawn mission has extensively examined the surface of asteroid Vesta, the second most massive body in the main belt. The high quality of the gathered data provides us with a uniqueExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 29 REFERENCES
The Violent Collisional History of Asteroid 4 Vesta
TLDR
Dawn observations confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation, and presents the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Vesta’s Shape and Morphology
TLDR
Dawn observations confirm the large impact basin at Vesta's south pole and reveal evidence for an earlier, underlying large basin (Veneneia), underscoring Vesta’s unique role as a transitional solar system body. Expand
Dawn at Vesta: Testing the Protoplanetary Paradigm
TLDR
Dawn's results confirm predictions that Vesta differentiated and support its identification as the parent body of the HEDs, and present the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Color and Albedo Heterogeneity of Vesta from Dawn
TLDR
Dawn's observations confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation, and reveal its color and photometric diversity are indicative of its status as a preserved, differentiated protoplanet. Expand
Spectroscopic Characterization of Mineralogy and Its Diversity Across Vesta
TLDR
The mineralogy of Vesta, based on data obtained by the Dawn spacecraft’s visible and infrared spectrometer, is consistent with howardite-eucrite-diogenite meteorites, which suggests a complex magmatic evolution that led to a differentiated crust and mantle. Expand
Mega-ejecta on asteroid Vesta
[1] Asteroid 4 Vesta, sometimes called the “smallest terrestrial planet”, will be orbited next July by NASA's Dawn mission. This will be the first time a small planet is visited by a spacecraft, andExpand
Meteorites may follow a chaotic route to Earth
It is widely believed that meteorites originate in the asteroid belt, but the precise dynamical mechanism whereby material is transported to Earth has eluded discovery. The observational data for theExpand
Impact excavation on Asteroid 4 Vesta: Hubble Space Telescope results
Hubble Space Telescope images of asteroid 4 Vesta obtained during the favorable 1996 apparition show an impact crater 460 kilometers in diameter near the south pole. Color measurements within theExpand
Chips off of Asteroid 4 Vesta: Evidence for the Parent Body of Basaltic Achondrite Meteorites
TLDR
The sizes, ejection velocities of 500 meters per second, and proximity of these fragments to the 3:1 resonance establish Vesta as a dynamically viable source for eucrite, diogenite, and howardite meteorites. Expand
Constraints on the role of impact heating and melting in asteroids
(Received 1996 August 30; accepted in revised form 1997 January 30) Abstract-Imaging of asteroids Gaspra and Ida and laboratory studies of asteroidal meteorites show that im- pacts undoubtedly playedExpand
...
1
2
3
...