Was wondering if JWST has the capability to detect and image Russell's teapot. It seems to me that may retain enough IR energy. ;-)
Unfortunately, by definition, No :-(
From Wikipedia's Russell's teapot:
In an article titled "Is There a God?" commissioned, but never published, by Illustrated magazine in 1952, Russell wrote:
...f I were to suggest that between the Earth and Mars there is a china teapot revolving about the sun in an elliptical orbit, nobody would be able to disprove my assertion provided I were careful to add that the teapot is too small to be revealed even by our most powerful telescopes. But if I were to go on to say that, since my assertion cannot be disproved, it is intolerable presumption on the part of human reason to doubt it, I should rightly be thought to be talking nonsense.
So Russell's teapot is by definition too small to be seen by "even our most powerful telescopes".
Russell was clever enough not to say "even the most power telescope on Earth" which would have exempted space telescopes.
But my answer is so incredibly unsatisfying!
So I hope someone puts a normal china teapot with a favorably dark glaze (high emissivity/low albedo in visible and thermal IR wavelengths) several millions of miles further from the Sun than Earth, and calculates its Planetary equilibrium temperature to decide if somebody else's teapot would be detectable and if so, resolvable. :-)