The calculated distance (air line) between Pirogovskiy and Ostankinskiy is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Ostankinskiy is certainly longer, as only the direct route (as the crow flies) between Pirogovskiy and Ostankinskiy has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles