Lately I have been quite intrigued by this ancient theory about a rogue celestial body on a precarious orbit,... Firstly, I don't read the bible, so don't expect me to "come about" with anything in relation to the bible that may by chance coincide("wormwood")with the mentioned theory. With saying that, don't mention the bible at all,... period, it only stirs emotions that some aren't mature enough to manage, due to the neglectful, one sided, polluted, and diluted perceptions of reality... Anyhoo...!
IMO, It's a comet and not a planet, which would explain why they can't find it with the IRAS satellite, it's far too cold to establish an infrared reading.
There is a comet that some have in mind that could be this "Planet X" called 2000 CR105 (148209) 2000 CR105 - Wikipedia, the free encyclopedia,...
"2000 CR105, is currently the fourth most distant known object in the solar system after Eris, Sedna, and 2004 XR190. Considered a detached object, it circles the sun in a highly eccentric orbit every 3240 years at an average distance of 219 astronomical units"
... Planet X was also speculated to have an eccentric orbit of about 3600 years!
What are your thoughts?