[3] The crater lacks bright ejecta deposits and was imaged for the first time by the Voyager 2 spacecraft in January 1986.

[1] At roughly 78 kilometers in diameter,[1] Yangoor is the largest Arielian crater observed by the Voyager 2 spacecraft in its 1986 flyby of Uranus and its system of moons.

The crater rim of Yangoor is largely intact and rises 150–500 meters above the surrounding terrain, whilst an elongated central peak complex extends from the center to Yangoor's western rim and rises over 1 kilometer in height.

Astronomer A. Ruzicka proposed in 1988 that the flat portions of Yangoor represents a cryovolcanic flow burying the original crater floor.

A team of planetary scientists led by M. T. Bland modelled viscous relaxation for Yangoor in 2023, concluding that a surface heat flux of at least 30 mW/m2 is required to match observations.