55 Cancri A d
The exoplanet 55 Cancri A d is the outermost of the five known planets orbiting 55 Cancri A, an orange dwarf star 41 lightyears from the Solar system.[1][2]
The planet's discovery was announced in 2002.[3] Its mass is 3.878 times that of Planet Jupiter, and it takes 15.3 years to orbit its primary.
References
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"★ Star 55 Cancri". Stellar Catalog. Archived from the original on 2025-09-20. Retrieved 2026-07-16.
Binary star 55 Cancri is located 41 light years away from the Sun. It consists of a yellow star and a red dwarf. There are multiple known exoplanets in this system.
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Debra A. Fischer; Geoffrey W. Marcy; R. Paul Butler; Steven S. Vogt; Greg Laughlin; Gregory W. Henry; David Abouav; Kathryn M. G. Peek; Jason T. Wright; John A. Johnson; Chris McCarthy; Howard Isaacson (2008-03-01). "Five Planets orbiting 55 Cancri". The Astrophysical Journal. The American Astronomical Society. Archived from the original on 2026-07-16. Retrieved 2026-07-16.
We report 18 years of Doppler shift measurements of a nearby star, 55 Cancri, that exhibits strong evidence for five orbiting planets. The four previously reported planets are strongly confirmed here.
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Alicia Cermak (2019-04-22). "55 Cancri d". NASA Science. Archived from the original on 2026-04-02. Retrieved 2026-07-17.
55 Cancri d is a gas giant exoplanet that orbits a K-type star. Its mass is 3.878 Jupiters, it takes 15.3 years to complete one orbit of its star, and is 5.957 AU from its star. Its discovery was announced in 2002.