Saturn: the "Ringed Beauty" and His Moons
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Atlas-N00066579.jpgAtlas...maybe...63 visiteAbbiamo delle difficoltà ad identificare con certezza quale sia l'oggetto ripreso da Cassini ma, dopo aver dato una scorsa ai nostri Archivi, riteniamo - effettuando una comparazione visuale - che l'oggetto ripreso in questo frame sia la piccola luna conosciuta come Atlas.
Se Voi avete dei dubbi o ritenete che la nostra valutazione possa essere (o sia), di fatto, errata, scriveteci e dateci una mano a risolvere il mistero.
Caption NASA:"N00066579.jpg was taken on September 25, 2006 and received on Earth September 26, 2006. The camera was pointing toward SATURN, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Atlas-N00084624.jpgAtlas (1)80 visiteUna nuova (e secondo noi spettacolare, anche se segnata da innumerevoli artifacts) inquadratura della piccola luna-pastore saturniana "Atlas" la quale, nella maggior parte delle immagini Cassini, ci appare come un semplice ed insignificante puntino a ridosso dell'Anello "A" del Gigante Gassoso.
In questo frame, si distingue una regione di Atlas che appare caratterizzata da rilievi stratiformi i quali vengono a formare una sorta di montagna dall'apparenza conica e sulla cui sommità, che in questo frame è visibile proprio a ridosso del Terminatore, si intuisce l'esistenza di crepacci e, forse, di una vera e propria catena di strapiombi. Indefinibile in rilievo posto ad ore 11, sempre sulla linea del Terminatore (potrebbe essere un rilievo assimilabile ad una caldera).
Il resto di questo minuscolo mondo (dim. -> 37x34,4x27 Km), immerso nella luce del Sole, si presenta relativamente liscio - ma questo potrebbe essere un semplice effetto derivante dalla sovrasaturazione della porzione di frame che inquadra le regioni illuminate di Atlas - e molto luminoso. Da notare, tra ore 5 ed ore 6, la presenza di 2 o 3 rilievi che potrebbero essere dei crateri e, ad ore 2 e tra ore 4 ed ore 5, vediamo dei grandi bacini i quali conferiscono a questo corpo celeste l'apparente forma di un tubero.
La colorazione che abbiamo adottato (grigio/azzurra di base) è di fantasia ma, nello sceglierla, ci siamo riferiti ai colori naturali di Deimos (la Luna Marziana minore): un corpo celeste interno al quale Atlas a noi sembra assomigliare davvero parecchio.MareKromium
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Atlas-N00084627.jpgAtlas (by Dr M. Faccin)64 visitenessun commentoMareKromium
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Atlas-N00084629.jpgAtlas (2)82 visitenessun commentoMareKromium
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Atlas-N00084635.jpgAtlas (3)64 visitenessun commentoMareKromium
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Atlas-PIA06659.jpgAtlas: Ring-Master or Prisoner of the Rings?57 visiteCaption NASA originale:"Saturn's little moon Atlas orbits Saturn between the outer edge of the A-Ring and the fascinating, twisted, F-Ring. This image just barely resolves the disk of Atlas and also shows some of the knotted structure for which the F-Ring is known. Atlas is 32 Km (about 20 miles) across. The bright outer edge of the A-Ring is overexposed here, but farther down the image several bright ring features can be seen. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 25, 2005, at a distance of approx. 2, 4 MKM (about 1,5 MMs) from Atlas and at a Sun-Atlas-Spacecraft, or phase, angle of 60°. Resolution in the original image was 14 Km (approx. 9 miles) per pixel".
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Atlas-PIA07592.jpgAtlas, from 489.000 Km54 visiteOriginal caption:"The 'flying saucer' in this image is the small moon Atlas (20 Km or about 12 miles across), whose shadowy profile reveals its flattened shape. This image looks down onto the outer A-Ring and through the Encke and Keeler Gaps.
Two distinct, thin strands in the F-Ring are visible here, silhouetted against the Planet. Saturn's extended, high-altitude haze is seen near lower right.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on Aug. 2, 2005, at a distance of approx. 489.000 Km (such as about 304.000 miles) from Atlas and at a Sun-Atlas-spacecraft angle of 138°. The image scale is 3 Km (about 2 miles) per pixel".
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Atlas-PIA08147.jpgAtlas55 visiteCaption NASA originale:"The Cassini spacecraft looks up from beneath the ringplane to spy Atlas, hugging the outer edge of the A-Ring, above center.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 23, 2006, at a distance of approx. 1,1 MKM (such as about 700.000 miles) from Atlas (32 Km, or 20 miles across).
The image scale is roughly 7 Km (about 4 miles) per pixel on Atlas".
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Atlas-PIA08906.jpgAtlas and the F-Ring53 visiteCaption NASA:"The Cassini spacecraft gazes toward the multiple strands of the ever-changing F-Ring, also sighting Atlas at its station just beyond the A-Ring edge.
A few faint background stars are visible in the image. Atlas, which appears left of center, is 32 kilometers (20 miles across).
This view looks toward the unlit side of the Rings from about 58 degrees above the ringplane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Feb. 10, 2007 at a distance of approx. 1,7 MKM (such as about 1,1 MMs) from Atlas and at a Sun-Atlas-spacecraft, or phase, angle of 128°. Image scale is roughly 10 Km (such as about 6 miles) per pixel".MareKromium
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Atlas-PIA09818.jpgIn the Night...59 visiteCaption NASA:"Two of Saturn's ring moons draw close momentarily, before the inner of the pair moves off alone.
Atlas passes Prometheus (about 86 Km, or approx. 53 miles across, at center left) about once a month, then slowly and steadily pulls ahead of its slower moving sibling.
This view looks toward the unilluminated side of the Rings from about 23° above the Ring-Plane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on April 6, 2008. The view was acquired at a distance of approx. 1,6 MKN (such as about 975.000 miles) from Atlas.
Image scale is roughly 9 Km (about 6 miles) per pixel".MareKromium
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Atlas-PIA09818~0.jpgAtlas (MULTISPECTRUM; credits: Lunexit)53 visitenessun commentoMareKromium
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Atlas-PIA09885.jpgAtlas and the "Roche Division"56 visiteCaption NASA:"Atlas, seen here, is one of the two moons that ply the Roche Division -- the region between Saturn's A and F-Rings. Prometheus also orbits within this Division.
This view looks toward flying-saucer-shaped Atlas (32 Km, or about 20 miles across at its widest point) and the unilluminated side of the Rings from about 37° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 9, 2008. The view was obtained at a distance of approx. 1,5 MKM (such as about 925.000 miles) from Atlas and at a Sun-Atlas-Spacecraft angle of 44°.
Image scale is roughly 9 Km (approx. 6 miles) per pixel".MareKromium
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