[12] The Lightcurve Data Base assumes Zamenhof to be a common, carbonaceous C-type asteroid,[3] in agreement with the overall spectral type of the Themis family.
Lightcurve analysis gave a rotation period of 10.2 and 10.4 hours with a brightness amplitude of 0.15 and 0.30 magnitude, respectively (U=2/2).
[5][6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0891 and a diameter of 25.62 kilometers based on an absolute magnitude of 11.2.
[3] This minor planet was named after L. L. Zamenhof (1859–1917), a Polish-Jewish ophthalmologist and creator of Esperanto, a constructed international language.
[2] This asteroid and 1421 Esperanto are considered to be the most remote Zamenhof-Esperanto objects (a monument or a place celebrating Zamenhof).