So, it seems that the IAU has decided to name the object formerly known as 2003 UB₃₁₃, "Eris".  That is, of course, pretty amusing for the Discordians among us.  Regardless of what astrological meaning you want to give this object, it seems pretty clear that the logical choice for the glyph is the one below.  Robert Anton Wilson is probably dead by now, but I'm sure he's chuckling in his liquid nitrogen flask.