"This suggests it's not a comet because a comet would not be as large as the one we've
observed and a comet would probably have moved," Houck said. "A planet may have moved
if it were as close as 50 trillion miles but it could still be a more distant planet and not have
moved in six months time."

Whatever it is, Houck said, the mystery body is so cold its temperature is no more than 40
degrees above "absolute" zero, which is 456 degrees Fahrenheit below zero. The telescope
aboard IRAS is cooled so low and is so sensitive it can "see" objects in the heavens that are
only 20 degrees above absolute zero.

When IRAS scientists first saw the mystery body and calculated that it could be as close as
50 trillion miles, there was some speculation that it might be moving toward Earth.

[link to planet-x.150m.com]