Absolute photon yields for band emissions of the N+2 first-negative and N2 second-positive systems are predicted for proton aurorae in an N2 atmosphere. The predictions are made by using a proton auroral model based largely on collision cross-section information, including the production of these emissions in the atmosphere by secondary electrons. The photon yields for Balmer-alpha and Balmer-beta emissions and the total secondary electron production during proton aurorae are also determined. The results are compared with other predictions and with a limited numberof proton auroral observations.