Is the 2016 "Planet Nine" the same object as the 1983 "Mystery Body"?

1983’s “Mystery Body"
Distance: 50 billion miles (537 AU)
Where: Orion
Size: Possibly as large as Jupiter
Orbital Period: ?
Observed: Initially reported 2 observations, 6 months apart

2016’s “Planet Nine"
Distance 20 to 50 billion miles (~200 AU to 500 AU)
Where: ?
Size: 5x to 10x the size of Earth
Orbital Period: 10,000 to 20,000 years
Observed: None

From 1983 (Washington Post): "A heavenly body possibly as large as the giant planet Jupiter and possibly so close to Earth that it would be part of this solar system has been found in the direction of the constellation Orion by an orbiting telescope aboard the U.S. infrared astronomical satellite."

From 1983 (Washington Post): "The most fascinating explanation of this mystery body, which is so cold it casts no light and has never been seen by optical telescopes on Earth or in space, is that it is a giant gaseous planet as large as Jupiter and as close to Earth as 50 trillion miles." (article was corrected to say 50 billion (not trillion)

From 1983: (Washington Post): "The mystery body was seen twice by the infrared satellite as it scanned the northern sky from last January to November, when the satellite ran out of the supercold helium that allowed its telescope to see the coldest bodies in the heavens."

[link to www.washingtonpost.com (secure)]

From 2016 (Newsweek): "The planet is believed to orbit the sun every 10,000 to 20,000 years and does so at an average distance of 2.8 billion miles from the sun” [looks like this distance is reported inaccurately?]

From 2016 (Newsweek): "The planet, nicknamed “Planet Nine,” is believed to be five to ten times as big as Earth and nearly the size of Neptune, although the astronomers Michael Brown and Konstantin Batygin said they haven’t directly observed the planet."

[link to www.newsweek.com]

Maybe it isn't the massive body that will show up anytime soon. 20-50 billion miles is a long ways out there (500 AU). Maybe it has planets or moons of lesser size orbiting it, affected by the sun and closer and more easily visible.

There was the article from the 1987 NEW SCIENCE AND INVENTION ENCYCLOPEDIA that showed a dead star at 50 billion miles and a tenth planet at 4.7 billion. For the planet, 4.7 billion is still way out there at 50 AU (Neptune is 30 AU) so not readily observable in 1987.

Here is a pic of the page:

[link to media-cache-ec0.pinimg.com]

Not sure what information that the encyclopedia's image was based on. Would be interested to find out.

Of course. And the same that they brought up a couple years ago on CNN. Why they are acting like it is a "new" find is BS. When NASA announced that the WISE telescope found a "huge object in the far outskirts of our solar system" it was immediately swept under the rug. I want to say that in 83 they mentioned something about it either causing problems or maybe that it would be seen in "30" years. So it is a couple years behind schedule!!

Wrong link, sorry.
These objects are not the same planet. Konstantin Batygin addresses that question at 26:08 in this interview from earlier this week.
[link to youtu.be (secure)]