W4-only Planet 9 candidate: 9.7 Earth masses at 300 AU, RA 45.2073183 Dec -24.9095084
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Abstract
W4-only source RA 45.2073183 Dec -24.9095084 W4=7.881 mag F=5.89 mJy pm=148 mas/yr. Gaia-dark 9/9 DSS empty 1980-2024 Spitzer/Herschel virgin MIRI 0. pm matches Keplerian for 300 AU. Mass 9.7 Earth at T=63K. Coordinates epoch 2027: 45.207610 -24.909555 pmRA -0.146 pmDec 0.014 arcsec/yr.
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View paper (DOI)Open access versionOpenAlexZenodo (CERN European Organization for Nuclear Research)Published 2026-10-17
Authors: Tiago Alves