The calculated distance (air line) between Novomoskovsk and Novomykolayivka is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Novomykolayivka is certainly longer, as only the direct route (as the crow flies) between Novomoskovsk and Novomykolayivka has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles