The listed diameter of the lunar crater Hubble is 81 km. The crater lies near the Moon’s east-northeastern limb, where viewing it from Earth is affected by the Moon’s libration.
Hubble is an impact crater named for American astronomer Edwin Powell Hubble. Its rim has been worn and eroded over time, with a somewhat irregular outline and a broader inner wall on the western side. The eastern rim is comparatively intact and can be seen from Earth when the Moon’s orientation is favorable.
Its lava-flooded interior is darker than the surrounding surface because basaltic material resurfaced the crater floor. Despite that resurfacing, the floor is relatively level and has no central peak; only a pair of small craterlets lies near its midpoint. The crater should not be confused with 2069 Hubble, an asteroid, or with the much larger Hubble Space Telescope. A nearby satellite crater, Hubble C, has a separately listed diameter of 53.64 km.