HAT-P-11c
HAT-P-11c is a gas giant exoplanet that orbits HAT-P-11, a K-type star. Its mass is 2.3 Jupiters, it takes 9.3 years to complete one orbit of its star, and is 4.13 AU from its star. Its discovery was announced in 2018. Discovery 
A trend in the radial velocity measurements taken to confirm the planet indicated a possible additional body in the system. This was confirmed in 2018 when a second planet was detected on an approximately nine year orbit. In 2020, the true mass of HAT-P-11c was measured via astrometry, along with Pi Mensae b.

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Exoplanets with Kepler designations
Exoplanets discovered in 2018
Exoplanets detected by radial velocity
Exoplanets detected by astrometry
Cygnus (constellation)