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Skinakas (hypothetical basin)

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Skinakas (hypothetical basin)

Skinakas (hypothetical basin)
Planet Mercury
Coordinates

8°N 280°W / 8°N 280°W / 8; -280Coordinates: 8°N 280°W / 8°N 280°W / 8; -280

Diameter 2300 km
Eponym Skinakas observatory

The Skinakas Basin is the informal name given to a structure on Mercury that appeared to be an extremely large impact basin. The traditional name for this region of Mercury is Solitudo Aphrodites. The limited-resolution images available showed a double-ringed structure, with the inner ring having a diameter of around 1600 km, which would have made it one of the largest impact basins in the solar system. It appeared to be even larger than the Caloris Basin on Mercury, which has been known since the Mariner 10 flybys of that planet. The part of the outer ring that was imaged appeared to correspond to a diameter of around 2300 km.[1]

The basin was supposedly centered at about 280°W, 8° N, and lay on the hemisphere of Mercury that was not imaged by Mariner 10. In 2001, it was observed and imaged by ALPO (Association of Lunar and Planetary Observers) members. It was then known as Solitudo Aphrodites. But it was followed by L. Ksanfomality from lucky imaging observations in 2004. The informal name is after the Skinakas observatory on Crete where the observations were taken.[1] Despite radar images having a far greater resolution they are not useful for detecting very large impact basins such as this one; for example, the Caloris Basin is also not visible in radar.[2] However, images returned during the inbound phase of the 6 October 2008 fly-by of Mercury by NASA's MESSENGER spacecraft showed conclusively that the Skinakas basin is illusory.

References

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