Compared to Earth's moon, its radius is about 42% and its density is about 32.5% resulting in a mass of about 2.5% of Earth's moon.

An alternate theory is that there might be ice volcanism distributing darker material to the surface. With its distant, inclined orbit, Iapetus is the only large moon from which there is a nice view of the rings of Saturn.As with some other Saturnian moons, Iapetus is in resonance with Saturn's largest moon, Titan, which orbits at 759,200 miles (1,221,850 kilometers). The next full Moon will be midday on Monday, August 3, 2020. NASA is preparing to send the drone-like Dragonfly to the intriguing moon, Titan.

Iapetus is best known for its dramatic 'two-tone' coloration, but discoveries by the Cassini mission in 2007 have revealed several other unusual physical characteristics, such as an equatorial ridge that runs about halfway around the moon.The numerical value of iapetus in Chaldean Numerology is: The numerical value of iapetus in Pythagorean Numerology is: Ultimately, we found that Jupiter is capable of ejecting the fifth giant planet while retaining a moon with the orbit of Callisto, on the other hand, it would have been very difficult for Saturn to do so because But that fact allows us to use computer simulations to tease out the history of Saturn’s inner moons, doing so, we find that they were most likely born during the most recent 2 percent of the planet’s history.
The great distance from Saturn's tidal forces and from most of the other moons and ring particles has probably allowed the Iapetus surface to be largely unaffected by any melting episodes that could have caused some smoothing or "resurfacing" as on some of the moons closer to Saturn.However, despite the great distance, Saturn has tidally locked Iapetus. a Titan, son of Uranus and Gaea.

The Voyager I and Voyager II encounters in 1980 and 1981 validated Cassini's original observations and explanation with images showing the different reflectivity of Iapetus' hemispheres.Iapetus has been called the yin and yang of the Saturn moons because its leading hemisphere has a reflectivity (or albedo) as dark as coal (albedo 0.03-0.05 with a slight reddish tinge) and its trailing hemisphere is much brighter at 0.5-0.6.Saturn's third largest moon, Iapetus has a mean radius of 457 miles (736 kilometers) and a density only 1.2 times that of liquid water. That means that the two objects speed up and slow down as they pass each other in a complex set of variations.

Iapetus [disambiguation] may mean: Iapetus (mythology), a Titan in Greek mythology | Iapetus (moon), one of the planet Saturn's moons | Iapetus Ocean, an ancient ocean between Laurentia and Baltica | Iapetus suture, line of closure of the Iapetus ocean (35 of 85 words, 4 definitions, pronunciation) en .wikipedia .org /wiki /Iapetus This heating will cause any volatile, or icy, species within the dark material to sublime out, and retreat to colder regions on Iapetus.

But that thinking changed in 2012, when French astronomers found that tidal effects – the gravitational interaction of the inner moons with fluids deep in Saturn’s interior – are causing them to spiral to larger orbital radii comparatively quickly.

Using data from NASA's Cassini spacecraft, scientists found Titan drifting away from Saturn a hundred times faster than previously understood.

Iapetus' wife is normally a daughter of Oceanus and Tethys named Clymene or Asia..
(The dark material absorbs more heat than the bright icy material.) As with some other Saturnian moons, Iapetus is in resonance with Saturn's largest moon, Titan, which orbits at 759,200 miles (1,221,850 kilometers).

1; noun iapetus A satellite of Saturn, the seventeenth closest to the planet, having one bright icy side and one very dark side, discovered by Cassini in 1671 (diameter 1,440 km).

He correctly concluded that Iapetus had one side much darker than the other side, and that Iapetus was tidally locked with Saturn.Scientists have long wondered why one hemisphere of Iapetus is so dark in comparison to its other hemisphere, and in comparison to other surfaces in the Saturn system.

Pronunciation . a natural satellite of the planet Saturn.

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