The calculated distance (air line) between Großrosseln and Bochum-Hordel is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Großrosseln and Bochum-Hordel has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles