Distance between Cologne, Germany and Portsmouth, New Hampshire, USA
5686 km = 3533 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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Cologne, Germany
Country: GermanyCologne’s coordinates: 50°55′59″ N, 6°57′00″ E
Population: 963,395
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Portsmouth, USA
Country: USAState: New Hampshire
Portsmouth’s coordinates: 43°04′18″ N, 70°45′45″ W
Population: 20,779
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Wikipedia article: Portsmouth
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