| Risultati della ricerca nelle immagini - "Basho" |
ZZ-Mercury-Craters-Basho_Crater-PIA16625-PCF-LXTT-IPF.jpgBasho Crater (Absolute Natural Colors; credts for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)117 visiteToday's APOD (obtained by the NASA - MESSENGER Spacecraft during the past month of November) provides us with the best look yet at Basho Crater (approximately 75 Km - such as about 47 miles - in diameter): a (relatively) young Impact Crater located in the Southern Hemisphere of the Planet Mercury. Basho Crater features some of the most striking Albedo (---> Reflectivity) contrasts that can be found on the whole Surface of the Innermost Planet of the Solar System, with both Low-Reflectance Ejecta and High-Reflectance Deposits (probably the most "famous", common and yet highly controversial - as far as its origin is concerned -Mercurian Surface Feature ever discovered: the so-called Hollows).
Date acquired: November, 6th, 2012
Image Mission Elapsed Time (MET): 260649832
Image ID: 2901613
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 32,47° South
Center Longitude: 189,2° East
Resolution: 103 meters/pixel
Solar Incidence Angle: 32,4° (meaning that the Sun, at the time that the pictures were taken, was about 57,6° above the imaged Local Mercurian Horizon)
Emission Angle: 4,9°
Sun-Mercury-Messenger (or "Phase") Angle: 32,6°
This picture (which is an Original NASA - MESSENGER Spacecraft color frame published on the NASA - Planetary Photojournal with the ID n. PIA 16625) has been additionally processed and then re-colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - MESSENGER Spacecraft and then looked down, towards the Surface of Mercury), 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 other things, the existence of different Elements (Minerals) present on the Surface of Mercury, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
|
|
ZZ-Mercury-Global_View_of_the_Surface-PIA14378.jpgThe Cratered Surface of Mercury (Natural Colors; credits: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)86 visiteThis color image reveals two of Mercury's named Craters, Basho and Bartok. Basho is the Dark-Rimmed Crater to the far left of the image, and Bartok is the bright yellow crater approximately in the center. Both Craters have visible Central Peaks, but Bartok's Peaks appear blue in this image, indicating they may be made of a different material that was unearthed by the large force of the impact.
This image was acquired as part of MDIS's color base map. The color base map is composed of WAC images taken through eight different narrow-band color filters and will cover more than 90% of Mercury's Surface with an average resolution of 1 Km/pixel (0,6 miles/pixel). The highest-quality color images are obtained for Mercury's Surface when both the Spacecraft and the Sun are overhead, so these images typically are taken with viewing conditions of low Incidence and Emission Angles.
Date acquired: June, 21st, 2011
Image Mission Elapsed Time (MET): 217134583, 217134599, 217134579
Image ID: 407077, 407081, 407076
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
WAC filters: 9 (1000 nanometers), 7 (750 nanometers), 6 (430 nanometers) as red-green-blue.
Center Latitude: 3,.68° South
Center Longitude: 221,4° East
Resolution: 1806 meters/pixel
Scale: Basho, the Dark-Rimmed Crater at far left, is approx. 74 Km in diameter.
Solar Incidence Angle: 51.4° (with the Sun about 38,6° above the Local Horizon)
Emission Angle: 0,6°
Sun-Target-Spacecraft (or "Phase") Angle: 51,6°MareKromium
|
|
|
|
| 2 immagini su 1 pagina(e) |
|
