[12] Fukushima has been characterized as a reddish P-type asteroid by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer.
An observation by Brian D. Warner at the U.S. Palmer Divide Observatory in Colorado rendered a rotation period of 9.418±0.001 hours with a high brightness variation of 0.67 in magnitude (U=3), indicating that the body has a non-spherical shape.
[11] This observation concurs with another measurement taken at the Oakley Observatory that rendered a period of 9.41±0.01 and an amplitude of 0.50 mag (U=3),[9] superseding a less accurate lightcurve produced by the PDS of 8.40 hours (U=2).
[10] On 16 December 2012, the asteroid occulted the star HIP 4315 over parts of Europe and North America.
[4][5][6][7] The Collaborative Asteroid Lightcurve Link gives preference to the results obtained by IRAS with an albedo of 0.0561 and a diameter of 20.38 kilometers.