I have noticed that our new dwarf planet (they prefer to be called 'little planets, but anyway), Eris, does not have a symbol. Ceres has a symbol [here]. But our Lady of Discord does not have a symbol [as seen here in this chart]. WTF!?
Might I suggest to our scientist people who make up these astronomical and astrological symbols perhaps something like the greek letter "K", but backwards, for "Kallisti", the words inscribed on the Apple of Discord?
If not that, then perhaps the symbol found on the title page, and on page 00021 of the Principia: the Five Fingered Hand of Eris.
What do YOU think?
...It would be interesting to know how our astrological charts come out with plotting Eris, by the way.