Distance between Kolkata, India and Istra, Moscow Oblast, Russia
5589 km = 3473 miles
We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.
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Kolkata, India
Country: IndiaKolkata’s coordinates: 22°33′45″ N, 88°21′46″ E
Population: 4,631,392
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Istra, Russia
Country: RussiaIstra’s coordinates: 55°55′11″ N, 36°52′07″ E
Population: 33,390
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Wikipedia article: Istra
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