in the poles to 6,574 K in the equator. A more recent but less detailed measurement by the Navy Precision Optical Interferometer gives , which likely corresponds to the equatorial radius. The star is a hybrid pulsator, showing both Delta Scuti and Gamma Doradus pulsations. The amplitude is of only 0.002 magnitudes.

Alderamin has a very high rotation speed of at least 246 km/s,