Cilix /ˈslɪks/ is a small crater on Europa that serves as the reference point for the moon's system of longitude. The longitude of Cilix's center is defined as being 182° W, thus establishing the moon's prime meridian. It is named after Cilix, the brother of Europa[1]

Cilix is about 15 km in diameter.

References

  1. "Planetary Names: Crater, craters: Cilix on Europa". planetarynames.wr.usgs.gov.
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