The calculated distance (air line) between Homyel' and Kastsyukowka is approximately 8 miles respectively 12 kilometers.
By car or train, the actual journey to Kastsyukowka is certainly longer, as only the direct route (as the crow flies) between Homyel' and Kastsyukowka has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles