[11][2] Mueller is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System.
[11] Mueller's spectral type is that of an E-type asteroid, typical for members of the Hungaria family.
[3][10] Four rotational lightcurves for this asteroid were obtained from photometric observations made by American astronomer Brian Warner at his Palmer Divide Observatory (716) between 2008 and 2016.
They all gave a concurring, well-defined rotation period of 2.942 to 2.944 hours with a brightness variation between 0.14 and 0.19 magnitude (U=3/3-/3-/3).
[a][7][8][9][b] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 3.9 kilometers in diameter and its surface has a high albedo of 0.389,[5][6] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 and calculates a diameter of 5.56 kilometers with an absolute magnitude of 13.2.