 Based on a generic magnitude-to-diameter conversion, "Kepler"s diameter is between 3 and 8 kilometer for an absolute magnitude of 14.2 and an assumed albedo in the range of 0.25 to 0.05.Since its spectral type falls into the class of stony asteroids, which have an averaged standard albedo around 0.20, "Kepler"s generic diameter is close to 4 kilometers, as the higher a body's albedo (reflectivity), the shorter its diameter at a fixed absolute magnitude (brightness).