| Piú viste - 1-Ceres and 4-Vesta |
085-Craters-Caparronia_Crater-PIA15129-PCF-LXTT.jpgMineral Diversity inside Caparronia Crater and Surroundings (Enhanced Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)242 visitenessun commentoMareKromium
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087-Craters-Unnamed_Craters-PIA14974.jpgUnnamed Craters in the Northern Regions (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)239 visitenessun commentoMareKromium
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083-Craters-Caparronia_Crater-PIA15129-PCF-LXTT.jpgCaparronia Crater and Surroundings (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)234 visiteThis Dawn FC (framing camera) image is dominated by Caparronia Impact Crater. Caparronia Crater is approximately 55 Km in diameter and has a mostly fresh, irregularly shaped Rim. It also has a curved, linear mound running across most of its base. For all of these reasons Caparronia is a distinctive Crater and this is why it was chosen to name the Quadrangle in which it is situated. The smooth region around Caparronia Crater is most likely fine Impact Ejecta, which were thrown out from the Crater at the time of its formation. Other impact related features are the linear chains of small, less than 1 km wide, Secondary Craters that occur throughout the image. Some particularly distinctive Crater Chains are in the bottom part of the frame.
Secondary Crater Chains are formed when relatively large debris are ejected from an impact and skip along the Surface, much like a stone skipping across a lake. There are also some linear scars running diagonally across the image, which are due to debris scouring across the Surface.
This image is centered in Vesta's Caparronia Quadrangle and the center Latitude and Longitude of the image is 52,5° North and 149.2° East. NASA's Dawn Spacecraft obtained this image with its framing camera on October 23rd 2011. This image was taken through the camera's clear filter. The distance to the Surface of Vesta, at the time the picture was taken, was approx. 700 km and the image has a resolution of about 70 meters per pixel. This image was acquired during the HAMO (High Altitude Mapping Orbit) phase of the mission.MareKromium
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068-Vesta-South_Pole_Dawn_3840.jpgFeatures of 4-Vesta: South Pole and South Polar Regions (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)230 visitenessun commentoMareKromium
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070-Vesta-PIA14973.jpgVesta's Northern and Equatorial Regions (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)225 visitenessun commentoMareKromium
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082-Craters-Unnamed_Crater-PIA15222-PCF-LXTT.jpgIn the Shadows... (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)224 visiteThis image, one of the first obtained by NASA's Dawn Spacecraft in its low altitude mapping orbit, shows part of the Rim of a (relatively) fresh Unnamed Crater. The Terrain shown here is located in an area known as the Heavily Cratered Terrain in the Northern Hemisphere of 4-Vesta.
The image, taken by Dawn's framing camera, is centered at around 17° North Latitude and 77° East Longitude. It was obtained on Dec. 13, 2011, from an altitude of approx. 119 miles (about 191 Km). It covers an area of about 11 by 11 miles (such as approx. 18 by 18 Km).MareKromium
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053-Vesta-PIA14312.jpgFeatures of 4- Vesta (Saturated Absolute Natural Colors; credits for the additional process. and color: Dr Paolo C. Fienga - Lunexit Team)215 visiteCaption NASA:"NASA's Dawn Spacecraft obtained this image of the giant Asteroid 4-Vesta with its framing camera on July, 9, 2011. It was taken from a distance of about 26.000 miles (approx. 41.000 Km). 4-Vesta is also considered a "protoplanet" because it is a large body that almost became a planet. Each pixel in the image corresponds to roughly 2,4 miles (about 3,8 Km).
The Dawn mission to 4-Vesta and 1-Ceres is managed by the Jet Propulsion Laboratory, for NASA's Science Mission Directorate, Washington, D.C. It is a project of the Discovery Program managed by NASA's Marshall Space Flight Center, Huntsville, Ala. UCLA, is responsible for overall Dawn mission science. Orbital Sciences Corporation of Dulles, Va., designed and built the Dawn Spacecraft!".
MareKromium
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065-Vesta-PIA14322-PCF-LXTT.jpgThe South Pole of 4-Vesta (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia) 192 visitenessun commentoMareKromium
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088-Craters-Unnamed_Crater-PIA15044-PCF-LXTT-1.jpgUnnamed Crater in Floronia Quadrant (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)190 visiteThis Dawn FC (framing camera) image is dominated by an approx. 20 Km-wide, young, fresh Unnamed Impact Crater. Surrounding this Unnamed Crater is its Ejecta Blanket, which is a covering of small particles that were thrown out during the impact that formed it and the Ejecta Blanket is the cause of the smooth Surface visible all around the Crater itself. This Ejecta Blanket buried many older, degraded craters, but some of them can be seen poking through the Blanket. Old and degraded craters are less clear or not visible directly next to the Unnamed Crater dominating the frame and this suggests that its Ejecta Blanket is very thick and fit to bury almost all the other (relatively small) impact craters located next to the bigger one.
There are also several distinctive Chains of small Craters running obliquely across the image on top of the Ejecta Blanket. They were not buried by the Ejecta Blanket and this means that they must be younger than it. These Crater Chains likely formed due to Secondary Impacts, when material thrown out of previous impacts re-impacted Vesta. Similarly, material ejected from the Unnamed approx. 20 Km-wide Crater has fallen back into the Crater itself and created several Pit-like features on its Floor.
This image is in Vesta's Floronia Quadrangle and the center latitude and longitude of the image is 32,5° North and 1,2° East. NASA's Dawn Spacecraft obtained this image with its framing camera on October 24th, 2011. This image was taken through the camera's clear filter. The distance to the Surface of 4-Vesta is 662 Km and the image has a resolution of about 62 meters per pixel. This image was acquired during the HAMO (High Altitude Mapping Orbit) phase of the mission.MareKromium
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074-Vesta-PIA14776.jpgNight and Day on 4-Vesta (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)186 visitenessun commentoMareKromium
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064-Vesta-Dawn_1024-PCF-LXTT.jpgFeatures of 4-Vesta (Enhanced Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)185 visiteCaption NASA:"Why is the Northern Half of Asteroid 4-Vesta more heavily cratered than the Southern one? No one is yet sure. This unexpected mystery has come to light only in the past few weeks since the robotic Dawn Mission became the first Spacecraft to orbit the second largest object in the Asteroid Belt between Mars and Jupiter. The Northern Half of 4-Vesta, seen on the upper left of the above image, appears to show some of the densest cratering in the Solar System, while the Southern Half is unexpectedly smooth. Also unknown is the origin of Grooves that circle the Asteroid nears its Equator, and the nature of the Dark Streaks that delineate some of 4-Vesta's Craters (for example the Crater just above the the image center). As Dawn spirals in toward 4-Vesta over the coming months, some answers may emerge, as well as Higher Resolution and color images".MareKromium
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063-Vesta-Dawn-image-072311-PCF-LXTT.jpgFeatures of 4-Vesta (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia)183 visiteCaption NASA:"NASA's Dawn spacecraft obtained this image with its framing camera on July 23, 2011. It was taken from a distance of about 3200 miles (approx. 5200 Km) away from the giant Asteroid 4-Vesta".MareKromium
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