It orbits the Sun in the outer main belt at a distance of 2.0–4.3 AU once every 5 years and 7 months (2,035 days).
[12] Lagrangea has been characterized as a dark D-type asteroid by Pan-STARRS photometric survey, while the LCDB assumes a generic, carbonaceous C-type.
[4][11] In September 2001, a rotational lightcurve of Lagrangea was obtained from photometric observations by French amateur astronomer Laurent Bernasconi.
[5][6][7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0612 and a diameter of 29.53 kilometers based on an absolute magnitude of 11.3.
[4] This minor planet was named after Italian mathematician Joseph-Louis Lagrange (1736–1813), who made significant contributions to astronomy, in particular celestial mechanics.