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Discovery and Characterization of the TOI-4468 Planetary System: A Transiting Hot Jupiter with a Lone Nearby Outer Companion

  • Authors: Joseph R. Livesey, Benjamin J. Hord, Juliette Becker, Andrew Vanderburg, Joseph E. Rodriguez, Elise Koo, Chelsea X. Huang, Guðmundur Stefánsson, Karen A. Collins, Ivan A. Strakhov, Zijun He, Maxwell A. Kroft, Robert Aloisi, Khalid Barkaoui, Fabian Rodriguez Frustaglia, Alyssa Jankowski, Kinga Kasprzyk, Judith Korth, Coleman Nelson, Hannu Parviainen, Adam Popowicz, Manfred Raetz, Richard P. Schwarz, Eva Stafne, Keivan G. Stassun, Thomas G. Beatty, Paul Foster, Thomas MacLean, Devansh Mathur, Lizhou Sha, Melinda Soares-Furtado

Joseph R. Livesey et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 1.

Known HJ systems containing nearby companions, with planetary radii to scale. WASP-47 b bears both an outer companion and an inner ultra-short-period planet, along with the cold giant WASP-47 c at 590 days. TOI-4468 is the first known system containing only a HJ and a nearby outer companion. The other eight systems exhibit only nearby inner companions.

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