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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)238 visitenessun commentoMareKromium
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086-Craters-Fabia_Crater-PIA15900-PCF-LXTT-IPF-2.jpgFabia Crater and Surroundings (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunar Explorer Italia - Italian Planetary Foundation)60 visiteThis Dawn framing camera (FC) image of Vesta shows Fabia crater, which is the large crater offset to the bottom right of the center of the image. Fabia crater is very distinctive because the two sides of its rim have very different states of freshness. In this image the bottom part of the rim is distinct and fresh but the top part of the rim is much more rounded and degraded. This dichotomy between the rims is possibly due to material slumping over the top part of Fabia's rim, which caused the rim to become obscured and look more degraded. There are linear features visible on the illuminated part of Fabia crater, which were probably created by material cascading towards the center of the crater. There is also a distinguishing band of bright material along the bottom rim of the crater.
This image is located in Vesta's Numisia quadrangle, in Vesta's northern hemisphere. NASA's Dawn spacecraft obtained this image with its framing camera on Oct. 19, 2011. This image was taken through the camera's clear filter. The distance to the surface of Vesta is 700 kilometers (435 miles) and the image has a resolution of about 63 meters (207 feet) per pixel. This image was acquired during the HAMO (high-altitude mapping orbit) phase of the mission.
MareKromium
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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)236 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)186 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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089-Craters-Licinia_Crater-PIA16050-PCF-LXTT-IPF.jpgLicinia Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)68 visiteThis NASA - Dawn Spacecraft Framing Camera (FC) image of 4-Vesta shows Licinia Crater, which is the large Impact Crater positioned in the center of the picture. Licinia Crater has a fresh, sharp Rim that is scalloped in shape; all around the Inner Walls of Licinia Crater there are many Streaks of Dark and Bright Dusty Material cascading towards the Crater's center. There are also many hummocky Slumps of Material around the Crater's Walls and Base. A large Mound of Material (most likely made of small Rocks and Dust) is well visible in the Crater's center, and the Mound itself is surrounded by more smooth and dark unidentified Material. The possibility that such (as of yet, we repeat, unidentified) smooth Material visible on 4-Vesta's Surface might be the so-called "Impact Melt" is currently under investigation. Licinia Crater is one of the freshest Impact Craters that can be seen in this image.
This area visible here is located in the "Floronia Quadrangle" of 4-Vesta, in the Northern Hemisphere of the Giant Asteroid. The NASA - Dawn Spacecraft obtained this image with its Framing Camera (FC) on October 11, 2011. The image was taken through the Camera's Clear Filter and the distance of the Spacecraft from the Surface of 4-Vesta was, at the time that the picture was taken, of approx. 700 Km (such as a little less than 435 miles); the image has a resolution of about 63 meters (207 feet) per pixel. This picture of Licinia Crater was acquired during the HAMO (---> High-Altitude Mapping Orbit) phase of the mission.
This frame (which is an Original NASA - Dawn Spacecraft b/w image published on the NASA - Planetary Photojournal with the ID n. PIA 16050) has been additionally processed and then colorized, according to an informed speculation carried out by Dr Paolo C. Fienga (LXTT-IPF), in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Dawn Spacecraft and then looked outside, towards the Giant Asteroid 4-Vesta), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present on the Surface of 4-Vesta, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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090-Craters-Cornelia_Crater-PIA16489-PCF-LXTT-IPF.jpgCornelia Crater (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)108 visiteThis frame shows us a consistent number of examples of long, narrow and sinuous Gullies that scientists on NASA's Dawn Mission have found on the Giant Asteroid 4-Vesta. The Impact Crater shown here is called Cornelia and the Gullies inside it - called "Type-B" Gullies - are different substantially from the straighter, wider, shorter Gullies that Planetary Scientists have found on different Celestial Bodies (like the ones located on the Rims of many Martian Impact Craters, for instance) and which are designated as "Type-A" Gullies (and the reason of such a distinction is found in the circumstance that these two Gully-types have different formation mechanisms). This picture was obtained by the NASA - Dawn Spacecraft Framing Camera on January 11, 2012; North is up.
This frame (which is an Original NASA - Dawn Spacecraft b/w image published on the NASA - Planetary Photojournal with the ID n. PIA 16489) has been additionally processed and then colorized, according to an informed speculation carried out by Dr Paolo C. Fienga (LXTT-IPF), in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Dawn Spacecraft and then looked outside, towards the Surface of the Giant Asteroid 4-Vesta), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present on the Surface of 4-Vesta, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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099-DawnTrajectory.jpgThe "Dawn" Mission to 4-Vesta and 1-Ceres56 visiteGerman mathematician Karl F. Gauss calculated from Piazzi's few observations that 1-Ceres circled around the Sun once every 4,6 years or about 4 years, 220 days. The asteroid has a very primitive surface, say scientists on NASA's Dawn mission, which will launch in 2007 and examine 1-Ceres in 2015. The asteroid, like a young planet, contains water-bearing minerals, and possibly a very weak atmosphere and frost. Infrared observations show that the surface is warm.
NASA's HST observed that 1-Ceres' surface has a large spot, which could be a crater formed when another asteroid struck Ceres.
A second explanation may be that the spot is a brighter substance in the asteroid's soil. In July 2001, an object larger than 1-Ceres was found in the vast Kuiper Belt of asteroids, stretching from 30 to 100 AU (2,8 to 9,3 BMs away from the Sun.) This brightest and therefore biggest non-planet space rock, 2001 KX76, could be as big as 1300 Km across.
Per maggiori informazioni sulla Missione "Dawn", visitate il Sito:
http://dawn.jpl.nasa.gov/mission/index.asp
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