The Distant EKO news is out again, and it has an open letter signed by a heap of planetary scientists.
http://www.boulder.swri.edu/ekonews/...ekonews116.pdf
Synopsis:-
There are a lot of folk out there who think Pluto ought to be returned to the planets fold, and so any talk of an undiscovered large TNO (2 - 4 earth diameters) which constrains smaller TNO orbital elements ... should be described as Planet X (or synonyms), not Planet 9.
Personally I agree.
Regards,
Tony Barry
WSAAG