Saturn: the "Ringed Beauty" and His Moons
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Janus-PIA11534.jpgCraters on Janus (possible Natural Colors; credits: Lunexit)54 visiteCaption NASA:"From hundreds of thousands of kilometers away, the Cassini Spacecraft spies craters on the Surface of the moon Janus.
This view looks toward the Saturn-facing side of Janus (about 179 Km, or approx. 111 miles across). North on Janus is up and rotated 27° to the right. The image was taken in Green Light with the Cassini Spacecraft narrow-angle camera on May 25, 2009.
Scale in the original image was roughly 4 Km (approx. 2,5 miles) per pixel. The image has been magnified by a factor of two and contrast-enhanced to aid visibility.
The view was acquired from a distance of approx. 730.000 Km (such as about 454.000 miles) from Janus and at a Sun-Janus-Spacecraft, or Phase, Angle of 38°".MareKromium
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Janus-PIA11575.jpgJanus (Natural Colors; credits: Lunexit)54 visiteCaption NASA:"The Cassini Spacecraft eyes a prominent crater on the moon Janus.
The South Pole lies on the Terminator at the bottom left of the image. This view is centered on terrain at 16° South Lat., 64° West Long.; this view looks toward the Leading Hemisphere of Janus (about 179 Km, or approx. 111 miles across). North on Janus is up and rotated 31° to the right.
The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on July 26, 2009. The view was acquired at a distance of approx. 98.000 Km (such as about 61.000 miles) from Janus and at a Sun-Janus-Spacecraft, or Phase, Angle of 58°.
Image scale is roughly 586 meters (1922 feet) per pixel".MareKromium
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Janus-PIA11597.jpgJanus (Natural - but enhanced - Colors; credits: Lunexit)54 visiteCaption NASA:"The Cassini Spacecraft looks toward the South Pole and cratered surface of Saturn's moon Janus.
The Pole of Janus lies on the Terminator, about one-third of the way inward from the bottom of the image. This view is centered on terrain at 42° South Lat. and 32° West Long.; the lit Terrain seen here is on the Saturn-facing side of Janus.
The image was taken in visible light with the Cassini Spacecraft narrow-angle camera on July 26, 2009. The view was acquired from a distance of approx. 100.000 Km (i.e. about 62.000 miles) from Janus and at a Sun-Janus-Spacecraft, or Phase, Angle of 63°.
Image scale is roughly 600 meters (1968 feet) per pixel".MareKromium
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Janus-PIA11694.gifObscuring Janus (GIF-Movie; credits: NASA/JPL/Space Science Institute)59 visiteCaption NASA:"Sunlight passing through the Cassini Division between Saturn's "A" and "B" Rings sweeps across and illuminates the surface of the moon Janus in this movie captured shortly after Saturn's August 2009 Equinox.
The novel illumination geometry that accompanied Equinox lowered the Sun's Angle to the Ring-Plane, significantly darkened the Rings, caused out-of-plane structures to look anomalously bright and threw shadows across the Rings. As this movie shows, the Equinox period also allowed the Rings to cast shadows on the moons. These scenes were possible only during the few months before and after Saturn's Equinox, which occurs only once in about 15 Earth years. Before and after Equinox, cameras on NASA's Cassini Spacecraft spotted not only the predictable shadows of some of Saturn's moons, but also the shadows of newly revealed Vertical Structures in the Rings themselves (see PIA11665).
This view looks toward the Trailing Hemisphere of Janus (approx. 179 Km, or about 111 miles across). North on Janus is up and rotated 8° to the right.
The movie is a concatenation of 12 still images. The images were obtained in Visible Light with Cassini's narrow-angle camera on Aug. 27, 2009. The view was acquired at a distance of approx. 268.000 Km (about 67.000 miles) from Janus and at a Sun-Janus-Spacecraft, or Phase, Angle of 25°.
Image scale is roughly 2 Km (5271 feet) per pixel".MareKromium
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Janus-PIA14607-PCF-LXTT-IPF.jpgClosing-up on Janus (Absokute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)86 visiteDark and deep Shadows were obscuring most part of Janus' cratered Surface, when the NASA - Cassini Spacecraft took a close look at this Saturnian moon during the Fly-By which occurred on March 27, 2012.
This view is centered on Terrain located at approx. at 13° South Latitude and 26° West Longitude. The image was taken in Visible Light with the NASA - Cassini Spacecraft Narrow-Angle Camera, at a distance of approximately 28.000 miles (such as about 45.061 Km) from Janus and at a Sun-Janus-Cassini Spacecraft , or Phase, Angle of 109°. Image scale is 892 feet (272 meters) per pixel.
This frame (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 14607) has been additionally processed, contrast enhanced, magnified and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Cassini Spacecraft and then looked outside, towards the Saturnian moon Janus), 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 others, the existence of different Elements present on the Surface of Janus, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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Janus-PIA14667-PCF-LXTT-IPF.jpgJanus, from far away... (Absolute Natural Colors; credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/Italian Planetary Foundation)90 visiteIn this frame, we can see that the NASA - Cassini Spacecraft has recently caught a glimpse of Janus: an irregularly-shaped Minor Saturnian moon. Lacking sufficient gravity to pull itself into a round shape, Janus (which is approx. 111 miles - such as about 178,63 - across) has had its lumpy primordial shape only slightly modified by impacts since its formation. A huge Impact Crater can be seen on the upper left corner of the illuminated side of Janus, jointly with other barely visible Surface Details. Furthermore, if you look carefully (after bringing the image to its full size), a few more Surface Details that are found of that part of Janus that lies in the shadows, beyond the Terminator Line, can be (even though just barely) seen, jointly with the outline of the moon.
This view looks toward the Trailing Hemisphere of Janus. North on Janus is up and rotated 44° degrees to the left. The image was taken in Visible Light with the NASA - Cassini Spacecraft Narrow-Angle Camera on April 28, 2013; the view was obtained at a distance of approximately 780.000 miles (such as about 1.255.285 Million KiloMeters) from Janus and at a Sun-Janus-Cassini Spacecraft (or Phase), Angle of 77°. The mage scale is roughly 5 miles (such as 8,04 Km) per pixel.
This frame (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 14667) has been additionally processed, contrast enhanced, magnified and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Cassini Spacecraft and then looked outside, towards the Saturnian moon Janus), 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 others, the existence of different Elements present on the Surface of Janus, each having a different Albedo (---> Reflectivity) and Chemical Composition.MareKromium
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Janus-Rotating-20080220.gifJanus "in motion" (GIF-Movie)85 visitenessun commentoMareKromium
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Janus_Epimetheus-N00150026-45.gifSaturnian Runners (GIF-Movie; credits: Elisabetta Bonora)54 visitenessun commentoMareKromium
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Janus_Prometheus-PIA08994.jpgJanus & Prometheus53 visiteCaption NASA:"The Cassini spacecraft spies two of the small, irregular moons that patrol the outer edges of Saturn's Main Rings.
Prometheus (102 Km, or approx. 63 miles across) hugs the interior of the F-Ring right of center, while Janus (181 Km, or about 113 miles across) hangs in the foreground below center. Hints of craters can be seen on Janus.
This view looks toward the unilluminated side of the Rings from less than 1° above the Ring-Plane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 14, 2007 at a distance of approx. 1,6 MKM (1 MMs) from Saturn.
Image scale is roughly 10 Km (about 6 miles) per pixel".MareKromium
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Janus_and_Prometheus-EB-LXTT.gifOrbital Imperfections (a GIF-Movie by Elisabetta Bonora - Lunexit Team)58 visitenessun commentoMareKromium
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JanusandPan-PIA10475.jpgOne is "Surrounded" and the other is "Free": Pan and Prometheus53 visiteCaption NASA:"Two of Saturn's moons coast along the outer edge of the Main Ring System. The orbits of seven small moons cluster just outside the F-Ring -- between the orbits of Pan and the co-orbital moons Janus and Epimetheus.
Pan (approx. 28 Km, or about 17 miles across at its widest point) appears as a bright dot within the Encke Gap, right of center. Janus (about 179 Km, or approx. 111 miles across at its widest point) lies outside the A and F-Rings, below center.
This view looks toward the sunlit side of the rings from about 2° below the Ring-Plane. The image was taken in visible light with the Cassini Spacecraft narrow-angle camera on Aug. 22, 2008. The view was obtained at a distance of approx. 1,3 MKM (such as about 808.000 miles) from Janus.
Image scale is roughly 8 Km (5 miles) per pixel".MareKromium
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Japetus & Streaks in the Sky.jpgJapetus and unusual "streaks" in the Sky of Saturn55 visitenessun commento
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