As a result of its rapid rotation, the shape of Varuna is deformed into a triaxial ellipsoid. Given the rapid rotation, rare for objects so large, Varuna's shape is described as a Jacobi ellipsoid, with an "a"/"b" aspect ratio of around 1.5–1.6 (in which Varuna's longest semi-axis "a" is 1.5–1.6 times longer than its "b" semi-axis). Examination of Varuna's light curve has found that the best-fit model for Varuna's shape is a triaxial ellipsoid with the semi-axes "a", "b", and "c" in ratios in the range of "b"/"a" = 0.63–0.80, and "c"/"a" = 0.45–0.52.