Geological Chronicle
Montes Harbinger forms an isolated cluster of lunar mountains along the western edge of the Mare Imbrium basin. The complex spans a diameter of 92.7 kilometers, centered at selenographic coordinates 26.89° N, 41.29° W.
The mountain group comprises four primary ridges and several smaller hills, each forming a small rise surrounded by the lunar mare. The peaks were named because they serve as harbingers of dawn on the crater Aristarchus, located to the southwest. The flooded crater Prinz also lies to the southwest.