Re: (IAAC) Obj: NGC 40 - Inst: Celestron 8"

all these thingies are also in my RNGC, and
> Xrf P                     No idea! Maybe other catalogs with this obj?
should mean an "eXtra ReFerence" in some source abbrevated by "P",
as you seem to suspect, also given in RNGC. Then again, I would suspect
that the RA/Dec *might* be for epoch 1975.0; but sorry no time to check ..
.. all as far as my mem serves ..
- hartmut