Of course, the size requirements of a "moon" are arbitrary. In this article, the... | Hacker News

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		tshaddox on Dec 22, 2011 \| parent \| context \| favorite \| on: Earth actually has two moons. Of course, the size requirements of a "moon" are arbitrary. In this article, they're calling an object 1 meter across or larger a "moon."

furyg3 on Dec 22, 2011 [–]

Natural satellites of all size are commonly referred to as "moons", so I'm not sure how arbitrary it is.

The only exception I can think of at the moment are natural satellites which are part of a greater planetary ring...

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