Ītlas is significantly perturbed by Prometheus and to a lesser degree by Pandora, leading to excursions in longitude of up to 600 km (~0.25°) away from the precessing Keplerian orbit with a rough period of about 3 years. The size of the equatorial ridge is comparable with the expected Roche lobe of the moon, which means that for any additional particles impacting the equator, the centrifugal force will nearly overcome Atlas's tiny gravity, and they will probably be lost. The most likely explanation for this unusual and prominent structure is that ring material swept up by the moon accumulates on the moon, with a strong preference for the equator due to the ring's thinness. High-resolution images taken in June 2005 by Cassini revealed Atlas to have a roughly spherical centre surrounded by a large, smooth equatorial ridge. In 2004 a faint, thin ring, temporarily designated R/2004 S 1, was discovered in the Atlantean orbit. However, now it is known that the outer edge of the ring is instead maintained by a 7:6 orbital resonance with the larger but more distant moons Janus and Epimetheus. It is also designated Saturn XV.Ītlas is the closest satellite to the sharp outer edge of the A ring, and was long thought to be a shepherd satellite for this ring. In 1983 it was officially named after Atlas of Greek mythology, because it "holds the rings on its shoulders" like the Titan Atlas held the sky up above the Earth. I ditched for another app that, while worse at showing labels, gave me the detail necessary to identify features accurately.Atlas is an inner satellite of Saturn which was discovered by Richard Terrile in 1980 from Voyager photos and was designated S/1980 S 28. Indeed, the in app chart is such low resolution that I had a hard time identifying craters because identifying details were missing. When out observing with my small (130mm) reflector Telescope, I can clearly see much smaller details than shown in this image. + This turned out to be a BIG one for me: Lowest resolution imagery or any of the moon maps. + All imagery has a good (though static) lighting angle such that terrain relief is clear.
ONLINE MOON ATLAS FULL
+ Full 3D globe if you want or explore from other angles. + Has upside-down & mirror mode, and night vision (red) mode. + Provides extra data (including libration plot), not just the map itself! + Dynamic labeling based on zoom (clearest labeling I’ve seen among apps!) + Takes into account libration and viewers position Very featureful, but low rez images makes this useless with telescope If you fancy trying to land on the Moon, try Apollo Eagle, a simulation of the last 50,000 feet of the Apollo 11 landing. Mars, Mercury, Venus, Jupiter and Saturn atlases are also available on the App Store!Īlso there is Planisphere, a star charting app, available on the App Store! You can swipe left and right on the phase view to go backwards and forwards a day and on the libration chart to go backwards and forwards a month. In addition, information about the current Moon phase and libration are provided. Over 1800 named features are included as well as 26 spacecraft that reached the surface of the Moon. The Moon globe can be shown with north or south at the top or inverted to suit different telescope views.
ONLINE MOON ATLAS UPDATE
There is also a realtime mode that will update to the current time. The phase can be switched off and the far side is shown in a slightly darker shade of grey.ĭate, time and location can be changed. The feature database is searchable and can move the globe to a searched feature. You can switch to a 'Globe' mode that allows you to spin the Moon around to see far side features. Moon Atlas displays the phase and libration of the Moon from your chosen location and renders these on the globe. You can double tap on the labels to get more information about a particular feature. As you zoom in more labels appear as finer detail comes into view. This is a rendered sphere and not a static map image. Moon Atlas is an astronomy application that lets you use pinch and finger gestures to manipulate a 3D globe of the Moon.
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