W4-only Planet 9 candidate: 9.7 Earth masses at 300 AU, RA 45.2073183 Dec -24.9095084

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.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-10-17
DOI
https://doi.org/10.5281/zenodo.23439750
Primary Topic
Stellar, planetary, and galactic studies
Type
preprint
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preprint

W4-only Planet 9 candidate: 9.7 Earth masses at 300 AU, RA 45.2073183 Dec -24.9095084

Tiago Alves
Zenodo (CERN European Organization for Nuclear Research)
Stellar, planetary, and galactic studies
preprint

W4-only Planet 9 candidate: 9.7 Earth masses at 300 AU, RA 45.2073183 Dec -24.9095084

Tiago Alves
preprint en

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.

Zenodo (CERN European Organization for Nuclear Research)
Stellar, planetary, and galactic studies
DOIOpen Access PDFOpenAlex
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