The calculated distance (air line) between Novomoskovsk and Petropavlivka is approximately 55 miles respectively 88 kilometers.
By car or train, the actual journey to Petropavlivka is certainly longer, as only the direct route (as the crow flies) between Novomoskovsk and Petropavlivka has been calculated here.
Air line (approximately)
88 kilometers
48 nautical miles