The calculated distance (air line) between Aldenhoven and Bochum-Hordel is approximately 57 miles respectively 91 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Aldenhoven and Bochum-Hordel has been calculated here.
Air line (approximately)
91 kilometers
49 nautical miles