# Shikoku Facula

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Region of bright material on Titan

Shikoku Facula Cassini view of Shikoku Facula Feature type Facula Coordinates 10°24′S 164°06′W / 10.4°S 164.1°W / -10.4; -164.1 Diameter 200 km Eponym Shikoku

**Shikoku Facula** is a region of bright material on [Saturn](/source/Saturn)'s moon [Titan](/source/Titan_(moon)).

Shikoku was first seen in *[Cassini](/source/Cassini-Huygens_Mission)* images taken in October 2004 and has been observed several times since. Before it provisionally received an official name in August 2005, this feature was nicknamed "Great Britain" due to its shape. This feature, 200×160 kilometers across, is within Titan's [Shangri-La](/source/Shangri-La_(Titan)) dark region and is centered at [10°24′S 164°06′W / 10.4°S 164.1°W / -10.4; -164.1](https://geohack.toolforge.org/geohack.php?pagename=Shikoku_Facula&params=10.4_S_164.1_W_globe:Titan).[1] Images of Shikoku reveal a complex boundary between its margin and the dark terrain around it, and several dark channels terminating along the bright-dark boundary.

This feature was observed by the Cassini [radar](/source/Radar) instrument's [SAR imaging](/source/Synthetic_aperture_radar) mode on April 30, 2006. This new view reveals variations in roughness across Shikoku, including a circular patch of smooth terrain 35 kilometers across in northeastern Shikoku that may be an impact crater.[2] This circular feature, along with another region of relatively smooth terrain in southcentral Shikoku, do not appear to have a counterpart in the near-infrared images taken by the Imaging Science Subsystem cameras.

Shikoku Facula is named after [Shikoku](/source/Shikoku), the smallest of the four main [Japanese](/source/Japan) islands.

## References

1. **[^](#cite_ref-1)** ["Shikoku Facula"](https://planetarynames.wr.usgs.gov/Feature/6999). *Gazetteer of Planetary Nomenclature*. USGS Astrogeology Research Program.

1. **[^](#cite_ref-2)** [PIA08426: Radar Images Shikoku – "Great Britain"](https://photojournal.jpl.nasa.gov/catalog/PIA08426)

## External links

- Media related to [Shikoku Facula](https://commons.wikimedia.org/wiki/Category:Shikoku_Facula) at Wikimedia Commons

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Adapted from the Wikipedia article [Shikoku Facula](https://en.wikipedia.org/wiki/Shikoku_Facula) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Shikoku_Facula?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.