It orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 2 months (1,533 days).
[10] In May 2011, a rotational lightcurve of Zimmerwald was obtained by American astronomer Robert Stephens at the Center for Solar System Studies, California, using photometric observations taken at the Santana and Goat Mountain observatories (646, G79).
Lightcurve analysis gave a very long rotation period of 122±5 hours with a change in brightness of 0.60 magnitude (U=2+).
[4][7] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 11.03 kilometers using an absolute magnitude of 12.1.
It is located about seven miles south of the Swiss capital Bern, after which the binary asteroid 1313 Berna was named.