| Risultati della ricerca nelle immagini - "Malea" |
ESP_011605_1170_RED_abrowse.jpgDefrosting Malea Patera (Natural Colors; credits: Lunar Explorer Italia)73 visiteMalea Patera is one of a group of ancient volcanoes that ring the Hellas Impact Basin. This HiRISE image was intended to investigate the nature of the volcanic materials at this location. However, the image was taken in early Spring for this location in the Southern Hemisphere and so the ground is covered with bright frost except for some dark splotches found in discrete patches.
This is where the sunlight has penetrated the frost and initiated defrosting around discrete spots.
Clearly something is different about the patches where this defrosting has started before any other locations. One possibility is that these are (frost covered) dark sand dunes that heat up more easily than the surrounding terrain. However, we will need to take a new image in the Summer time to really know what is happening here.
Mars Local Time: 16:11 (middle afternoon)
Coord. (centered): 62,5° South Lat. and 53,3° East Long.
Spacecraft altitude: 249,1 Km (such as about 155,7 miles)
Original image scale range: 24,9 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 0,9°
Phase Angle: 72,4°
Solar Incidence Angle: 73° (meaning that the Sun is about 17° above the Local Horizon)
Solar Longitude: 192,6° (Northern Autumn)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer ItaliaMareKromium
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ESP_011605_1170_RGB.jpgDefrosting Malea Patera (edm - possible True Colors; credits: Dr M. Faccin)53 visitenessun commentoMareKromium
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ESP_023578_1130_RED_abrowse-PCF-LXTT.jpgFeatures of Malea Planum (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team) 223 visiteMars Local Time: 14:37 (Early Afternoon)
Coord. (centered): 66,7° South Lat. and 57,7° East Long.
Spacecraft altitude: 250,1 Km (such as about 156,3 miles)
Original image scale range: 25,0 cm/pixel (with 1 x 1 binning) so objects ~ 75 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: POLAR STEREOGRAPHIC
Emission Angle: 5,5°
Sun-Mars-Spacecraft (or "Phase") Angle: 61,7°
Solar Incidence Angle: 65° (meaning that the Sun is about 25° above the Local Horizon)
Solar Longitude: 341,0° (Northern Winter)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Drr Gianluigi Barca and Paolo C. Fienga - Lunar Explorer ItaliaMareKromium
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