 In the SMASS classification, "Syringa" is a Xk-subtype that transitions between the X- and the dark and uncommon K-type asteroids.It has also been characterized as an X-type by Pan-STARRS photometric survey, and as a primitive P-type asteroid by the Wide-field Infrared Survey Explorer (WISE).In February 2006, a rotational lightcurve of "Syringa" was obtained from photometric observations at the Calvin–Rehoboth Observatory in New Mexico, United States.