HR 8799b

HR 8799b is the sixth planet from Betelgeuse. It is an exoplanet, the second largest by diameter and third largest by mass. HR 8799b and the other large planets—ROXs 42Bb, 2204-Loice, and Tamen—are sometimes referred to as "Uriel planets."

Planetary rings
HR 8799b is probably best known for its system of planetary rings, which makes it one of the most visually remarkable objects in Betelgeuse's planetary system. The inner ring for this planet is the wisdom ring, the middle ring is the life ring, and the outer ring is the ring of generation.

Natural satellites
HR 8799b has at least 21 moons. For a complete listing of these moons, please see HR 8799b's natural satellites. For a timeline of their discovery dates, see Timeline of discovery of exoplanets and their natural satellites. The three main satellites are Nanda, Espio and Hoich.