| Risultati della ricerca nelle immagini - "Albedo" |
ESP_017693_1795_RED_abrowse.jpgThermal Anomaly in Aeolis and Zephyria Regions (Saturated Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)129 visiteThis image is taken of an interesting Linear Surface Feature in the Aeolis and Zephyria regions. Using the daytime IR imaging data from the THEMIS instrument, this feature has a higher daytime temperature than its surroundings while also being relatively dark.
When viewed at full HiRISE resolution, this area contains Sand Ripples with some consolidated, Bedrock-like material poking through. These Bedrock Outcrops are more pronounced along the southern portion of the image and are most apparent in the region of the Thermal Anomaly. The Outcrops trend generally East-West and appear sculpted by aeolian erosion.
In the area of the Anomaly, the sand between these Outcrops has a darker tone and gradually blends with the lighter material to either side. This darker sand may be the reason why the material has a "hot" signature compared to its surroundings, because dark materials absorb sunlight more efficiently.
Features similar to the one in this image help researchers to characterize such features and to understand whether such exposures may indicate possible Hydrothermal Fissures, or perhaps be just an exposure of a darker underlying material.
Written by: Shawn Hart and Ginny GulickMareKromium
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SOL1420-23-EB-PCF-LXTT.jpgVarious High-Albedo Surface Features - Soles 1420 until 1423 (an Image-Mosaic in Absolute Natural Colors by Elisabetta Bonora & Paolo C. Fienga - Lunexit Team)143 visiteNota: le aree superficiali ad Albedo elevata sono TUTTE sulla "linea di transito" del Rover.
Non riteniamo che via sia alcuna implicazione "scientifically-uncorrect" nel suggerire che, forse, da Pasadena il Rover lo guidano davvero "chirurgicamente", ma non solo (e forse non tanto) per evitare i Surface Hazards ma piuttosto per andare a visionare da quanto più vicino sia possibile dei rilievi - chiamiamoli così... - "intriganti e curiosi".
E' pure plausibile ritenere che l'Albedo elevata di alcuni rilievi sia il frutto di attività meccaniche svolte dal Rover sui medesimi (non parliamo, ovviamente, di "lucidatura", quanto di sfregamento e rullamento dei e sui rilievi in questione).
Certo è, se questa seconda ipotesi fosse corretta, che dovremmo allora supporre una incredibile luminosità dell'intera Superficie (o buona parte di essa), la quale rimane scura ed opaca SOLAMENTE a causa del manto di polvere rossiccia che sembra ricoprire tutto o quasi.
Le Vostre idee ed opinioni al riguardo saranno apprezzate.MareKromium
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ZZ-Mercury-Craters-Unnamed_Craters-PIA14362-PCF-LXTT.jpgAlbedo Differences (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)135 visiteCaption NASA:"This image depicts a stark contrast between Albedo differences on Mercury. The Crater Kalidasa, located in the upper left of the image, contains a smaller but exceptionally bright Crater on its Floor. Nearby to the South/West, Low Reflectance Material (LRM) is found on Kalidasa's Floor. LRM is also visible at the upper left corner of the image. The law of superposition tells us that Kalidasa must have formed before the small bright Crater".
Date acquired: June, 07th, 2011
Image Mission Elapsed Time (MET): 215940577
Image ID: 349800
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 17,25° South
Center Longitude: 182,2° East
Resolution: 141 meters/pixel
Scale: Kālidāsa Crater is approximately 100 Km in diameter.
Incidence Angle: 17,4°
Emission Angle: 65,8°
Sun-Target-Spacecraft (such as "Phase") Angle: 78,3°MareKromium
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![vo1_738a27[1]-PCF-LXTT.jpg](albums/userpics/10060/small_vo1_738a27%5B1%5D-PCF-LXTT.jpg "Nome del file=vo1_738a27[1]-PCF-LXTT.jpg
Dimensione del file=284KiB
Dimensioni=1823x2000
Aggiunta il=Giu 12, 2011")
vo1_738a27[1]-PCF-LXTT.jpgFrame Viking Orbiter 1 n. 738a27 (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)594 visitenessun commentoMareKromium
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![vo2_248b57[1]-PCF-LXTT.jpg](albums/userpics/10060/small_vo2_248b57%5B1%5D-PCF-LXTT.jpg "Nome del file=vo2_248b57[1]-PCF-LXTT.jpg
Dimensione del file=54KiB
Dimensioni=1130x931
Aggiunta il=Giu 20, 2011")
vo2_248b57[1]-PCF-LXTT.jpgFrame Viking Orbiter 2 n. 248b57 (Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga - Lunexit Team)206 visitenessun commentoMareKromium
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