Evidence for a Candidate Trans-Neptunian Planet at RA 6h 54m, Dec +66.6

We report evidence for a candidate planetary body in the outer solar system at right ascension 6h 54m, declination +66° 36' (J2000), in the constellation Ursa Major. Two independent lines of evidence support this claim. First, eigendecomposition of heliospheric residuals—the structure in solar wind and interplanetary magnetic field data that remains after removing all known planetary contributions—yields four significant eigenmodes whose geometric properties constrain the source to approximately 490 AU on a near-polar orbit (inclination ~90°). Second, an independent analysis of 559 long-period comet orbits from the JPL Small-Body Database reveals a 3.7σ overdensity of aphelion directions within 15° of the predicted position, consistent with gravitational perturbation of the inner Oort Cloud. These two detection channels probe entirely different physics yet converge on the same ~10° patch of sky. The James Webb Space Telescope has never observed this position. We present coordinates, predicted properties, and a falsifiable observational test.