Koper is located in Slovenia (Koper-Capodistria) and time zone Europe/Ljubljana.
Places nearby are Ankaran, Izola and Muggia.
Ljubljana is 83 km away, Kranj is 91 km away and Novo Mesto is 119 km away as the crow flies.
Distances from Koper to the most important cities in Slovenia and the world.
45.5469400°
13.7294400°
Public observatory in Vestal, New York, U.S.
https://en.wikipedia.org/wiki/Kopernik_Observatory_&_Science_Center