Lat: 86.08°N, Long: 37.3°E, Diam: 17.7 km, Depth: km, Rükl 4
Lunar Orbiter IV In this aerial view with the direction to the Moon's north pole up, the large flat area to the left of Fibiger is the floor of Byrd, with sunlit Byrd D at about 7 o'clock. The large oblong cratered area to the right of Fibiger is not named.
- Named for Joahnnes Andreas Grib Fibiger (1867-1928), a Danish pathologist and Nobel Prize winner (1926).
- New name approved by the IAU on January 22, 2009.