| Risultati della ricerca nelle immagini - "Helene" |
Helene from Voyager 2.jpgHelene from Voyager 261 visiteAnche per "Helene" vale quanto detto per Epimetheus e le altre Lune Minori di Saturno: forme irregolari e dimensioni davvero modeste. Schegge (frammenti) di corpi più grandi i quali, oggi, ci rammentano catastrofi planetarie occorse in epoche remote, o dei semplici KBO, catturati da Saturno mentre si trovavano a passare nelle prossimità del Gigante Anellato?
Voi che dite?
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Helene-EB.jpgIn front of the Giant... (Natural Colors; credits: Elisabetta Bonora - Lunexit Team)62 visitenessun commentoMareKromium
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Helene-MF-IR.jpgHelene (IR View - credits: Dr M. Faccin - Lunexit Team)66 visitenessun commentoMareKromium
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Helene-N00042585.jpgHelene and Enceladus56 visiteOriginal caption:"N00042585.jpg was taken on November 02, 2005 and received on Earth November 04, 2005. The camera was pointing toward HELENE at approximately 2.186.673 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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Helene-N00086687.jpgJust like Phobos: Helene (1)55 visitenessun commentoMareKromium
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Helene-N00086688.jpgJust like Phobos: Helene (2)55 visitenessun commentoMareKromium
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Helene-N00086694.jpgJust like Phobos: Helene (3)55 visitenessun commentoMareKromium
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Helene-N00086698.jpgJust like Phobos: Helene (4)54 visitenessun commentoMareKromium
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Helene-N00123958.jpgHelene56 visiteHelene 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".MareKromium
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Helene-N00124458.jpgHelene and a "Bright Companion" (possible True Colors; credits: Lunar Explorer Italia)56 visiteCaption NASA:"N00124458.jpg was taken on November 24, 2008 and received on Earth November 25, 2008. The camera was pointing toward HELENE that, at the time, was approx. 68.171 Km away.
The image was taken using the CL1 and CL2 filters".
Nota Lunexit: Helene è senza dubbio affascinante, con il suo colore rosso-arancio (tipico di tanti Corpi Celesti Minori e, in questo caso, anche esaltato dalla luce rosa-salmone che deriva dal Gigante Saturno), ma noi Vi invitiamo a considerare il puntino luminoso che viene inquadrato dalla freccia. Ebbene, a nostro avviso NON si tratta di un image-artifact e non dovrebbe essere una stella che splende sullo sfondo (la quale sarebbe dovuta sparire, letteralmente ingoiata - tecn. "washed away" - dalla stessa luminostà di Helene).
Che cosa sarà mai? La nostra ipotesi è: forse (e ribadiamo FORSE!) si potrebbe trattare di un altro - minuscolo - Corpo Roccioso, non troppo distante da Helene.
Forse una "luna" di Helene stessa (un fenomeno decisamente raro, ma non impossibile: ricordate l'asteroide Ida ed il suo piccolissimo compagno Dactyl? Beh, questo potrebbe essere un fenomeno analogo...).MareKromium
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Helene-N00172780-N00172904-GB-LXTT.gifFlying around Helene (a GIF-Movie by Dr Gianluigi Barca - Lunexit Team)222 visitenessun commentoMareKromium
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Helene-N00172877_78_79.jpgHelene (RAW Natural Colors; credits for the additional process. and color.: Dr Marco Faccin - Lunexit Team)217 visitenessun commentoMareKromium
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