sentences:  The Lightcurve Data Base assumes "Zamenhof" to be a common, carbonaceous C-type asteroid, in agreement with the overall spectral type of the Themis family.Two rotational lightcurves of "Zamenhof" were obtained from photometric observations in 2006 and 2011.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 ().