Saturn: the "Ringed Beauty" and His Moons |
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Pallene20 vistePallene è un satellite naturale minore del pianeta Saturno, la cui orbita è situata fra quelle di Mimas ed Encelado. Pallene è stata scoperta nel 2004 da Sébastien Charnoz del Cassini Imaging Team, il gruppo scientifico responsabile dell'analisi delle immagini scattate dalla Sonda Cassini, guidato da Carolyn Porco.
Dopo aver ricevuto la designazione provvisoria S/2004 S 2, il satellite fu successivamente battezzato dall'Unione Astronomica Internazionale con il nome di Pallene, una Ninfa della mitologia greca. Si rilevò inoltre che il satellite coincideva con un oggetto avvistato il 23 agosto 1981 in una singola fotografia scattata dalla sonda spaziale Voyager 2, con una distanza stimata da Saturno di circa 200.000 km; al satellite, di cui non fu possibile stabilire l'orbita esatta, venne allora attribuita la designazione S/1981 J 14.
L'orbita di Pallene è visibilmente influenzata da una Risonanza Orbitale con Encelado, molto più grande, anche se l'effetto è meno intenso rispetto alle perturbazioni esercitate da Mimas sulla vicina Metone. Il fenomeno è all'origine delle oscillazioni periodiche nel semiasse maggiore di circa 4 Km, e della longitudine del Nodo Ascendente di 0,02° (pari a circa 75 Km). Anche l'Eccentricità Orbitale di Pallene varia (fra 0,002 a 0,006), mentre la sua Inclinazione oscilla fra 0,178° e 0,184°.
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Another UFO in the Space of Saturn: the UFO has diappeared (natural colors; credits: Lunexit)34 vistenessun commento
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The tenuous E-Ring of Saturn (RAW frame)15 visteCaption NASA:"W00051101.jpg was taken on November 12, 2008 and received on Earth November 13, 2008. The camera was pointing toward SATURN's E-RING that, at the time, was approx. 1.234.847 Km away.
The image was taken using the CL1 and BL1 filters".
Nota Lunexit: in questo frame potete osservare una serie impressionante di image-artifacts (noise, per lo più, come spesso si vede nei frames CASSINI).
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Lost in the Space of Saturn... (natural colors; credits: Lunexit)14 visteTitano: il disco, appena percettibile, splende di un leggero color giallo. Siamo a circa 1,8 MKM dalla "Luna Nebbiosa".
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Helene13 visteHelene is one of the named Minor Moons of Saturn. Also known as Saturn XII (or S12), Helene is an irregularly shaped (---> nonspherical) body measuring about 22 miles (such approx. 36 Km), by about 20 miles (approx. 32 Km), by about 18 miles (approx. 30 Km).
Helene orbits Saturn at a mean distance of about 234.500 miles (approx. 377.400 Km) and has an Orbital Period of 2,7369 Earth Days — the Rotational Period is unknown but is assumed to be the same as the Orbital Period (meaning that Helene shall always show the same side to Saturn - just like the Moon does to Earth).
Helene was discovered by French astronomers P. Laques and J. Lecacheaux in 1980 during ground-based observations of Saturn.
Another moon, Dione, is co-orbital with Helene: that is, Helene orbits Saturn at the same distance as Dione but precedes Dione by about 60°.
Before the present name was adopted, the moon was referred to as "Dione-B" or also "Electra".
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Another UFO in the Space of Saturn?22 visteCaption NASA:"N00124205.jpg was taken on November 16, 2008 and received on Earth November 17, 2008. The camera was pointing toward SATURN-RINGS which, at the time, were approximately 382.907 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Another UFO in the Space of Saturn?16 visteCaption NASA:"N00124204.jpg was taken on November 16, 2008 and received on Earth November 17, 2008. The camera was pointing toward SATURN-RINGS that, at the time, were approx. 383.855 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Another UFO in the Space of Saturn?13 visteCaption NASA:"N00124204.jpg was taken on November 16, 2008 and received on Earth November 17, 2008. The camera was pointing toward SATURN-RINGS that, at the time, were approx. 384.329 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Another UFO in the Space of Saturn?16 visteCaption NASA:"N00124202.jpg was taken on November 16, 2008 and received on Earth November 17, 2008. The camera was pointing toward SATURN-RINGS that, at the time, were approx. 384.802 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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More UFO's in the Space of Saturn?41 visteCaption NASA:"N00124198.jpg was taken on November 16, 2008 and received on Earth November 17, 2008. The camera was pointing toward SATURN-RINGS that, at the time, were approx. 387.642 Km away, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated".
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Possible UFO (and Cosmic Ray) in the Space of Saturn (GIF-Movie: credits: Dr G. Barca)22 vistenessun commento
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The "Foggy" Moon (IR Light - possible True Colors; credits: Lunexit)70 visteCaption NASA:"The Cassini Spacecraft looks through Titan's thick atmosphere to reveal bright and dark terrains on the Saturn-facing Side of the Planet's largest moon. North is up.
The image was taken with the Cassini Spacecraft narrow-angle camera on Oct. 11, 2008 using a spectral filter sensitive to wavelengths of IR Light centered at 938 nanometers. The view was obtained at a distance of approx. 2,2 MKM (about 1,3 MMs) from Titan and at a Sun-Titan-Spacecraft, or Phase, Angle of 10°.
Image scale is roughly 13 Km (about 8 miles) per pixel".
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