| Ultimi commenti - Mars Reconnaissance Orbiter (MRO) |
ESP_018273_2245_RED_abrowse-00.jpgPossible Water-Ice in a "fresh" Crater (CTX Frame - Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)59 visitePrevious HiRISE images of Fresh Craters in the Middle to High Northern Latitudes show exposed Water Ice on the Poleward-facing slopes. Here is another example.
The EDM shows an approx. 6 meters (20 feet) diameter Crater. Based on before and after images acquired by the Odyssey THEMIS and MRO CTX cameras, respectively, this Crater formed some time between April 2004 and January 2010.
The Crater is at a latitude of 44° North and is itself located on the ejecta of a larger crater. The image was acquired in early Summer, when frost at this latitude is not expected.
It is therefore believed that the bright blueish material that can be seen in the EDM is Subsurface Ice that was exposed by the impact.
This ice is probably at the same depth and has a similar origin to that excavated by the Phoenix Lander back in 2008. The area of exposed ice based on the HiRISE images is about 1-2 square meters (such as 10-20 square feet).MareKromium02/13/11 at 16:49MareKromium: ...altro craterino fresco con raggi e tracce di &q...
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ESP_015962_1695_RED_abrowse-00.jpgRelatively fresh Impact Crater (CTX Frame - Natural Colors; credits: Dr Paolo C. Fienga - Lunexit Team)74 visiteThis image shows a very fresh-looking Impact Crater with an extensive Radial Ejecta Blanket.
The Crater was first seen in an image acquired with MRO's Context Camera (CTX). The best image of this Region prior to CTX was from one of the Viking Orbiters, and the Crater is not visible in it.
This could either mean that the Crater formed sometime between 1976 and 1999, or that there might have been more Dust on the Surface in 1976, or that maybe the air could have been hazy, thus obscuring the Crater.
Based on the HiRISE image, we suspect that the Crater is more than several decades old, because at full resolution we see a "Textured Surface" (see EDM n.2) that is common in Dust-Mantled Regions of Mars, but absent in the youngest craters.MareKromium02/13/11 at 16:48MareKromium: ...altro craterino fresco con raggi...
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PSP_004030_1855_RED_browse.jpgBlast from the (Very Recent) Past56 visiteIn the center of this image is a very sharp-rimmed impact crater just 35 mt wide.
It lies in a bright, dust-covered region, but is surrounded by a slightly darker spot about 3 Km wide. The impact event created a blast of high winds that disturbed the dust and darkened the spot.
Since dust is constantly settling over the Region, the fact that we can still see the dark region means the impact event occurred of late, perhaps in recent decades. There are many dark streaks on topographic slopes over an even wider region surrounding the dark spot - these could be due to dust avalanches triggered by the impact, either from the air blast or from seismic shaking of the ground.
There are also rays of very small (approx. 1 mt in diameter) secondary craters extending radially outward from the 35-mt crater, created by the impact of rocks ejected from the main crater.
Thus a small impact crater has modified the surface over an area more then 10.000 times greater than that of the crater's interior.MareKromium02/13/11 at 16:45MareKromium: Un esempio bellissimo e lampante di "impatto/...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/13/11 at 16:31MareKromium: ...Direi di no Amici, direi proprio di no.
Nel...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/13/11 at 16:05greenwarrior: Effettivamente ? strano come cratere da impatto. S...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/13/11 at 16:00Ufologo: ...Visto poi che non si sono mai osservati impatti...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/13/11 at 12:04MareKromium: ...Gasp: il thread mi ? "sfuggito di mano&quo...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/12/11 at 19:40Matteo Fagone: Vero. Concordo. Per?... la Natura quando si arrabb...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/12/11 at 18:59george_p: Sono fermamente convinto che, con le conoscenze ap...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/12/11 at 18:10Matteo Fagone: Bene. Allora osservate attentamente la texture gen...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/12/11 at 17:57cicas65: Si vedono come dei "tubi" che corrono al...
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ESP_019195_2175_RED_abrowse.jpgRecent Impact (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)134 visiteAcquisition Date: 31 August 2010
Mars Local Time (MLT): 15:22 (Early Afternoon)
Latitude (centered): 37,3° North
Longitude (East): 182,2°
Range to Target Site: 298,4 Km (such as about 186,5 miles)
Original image scale range: 29,8 cm/pixel (with 1 x 1 binning) so objects ~90 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission angle: 2,5°
Sun-Mars-Spacecraft (or Phase) Angle: 52,0°
Solar Incidence Angle: 49° (with the Sun about 41° above the Local Horizon)
Solar Longitude: 141,1° - Northern SummerMareKromium02/12/11 at 17:49george_p: Gi?, ? facile "fantasticare" notando que...
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