The meridian 143° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 143rd meridian west forms a great circle with the 37th meridian
east.
Starting at the North
Pole and heading south to the South Pole, the 143rd meridian west passes
through:
| Co-ordinates | Country, territory or sea | Notes |
|---|---|---|
| 90°0′N 143°0′W / 90°N 143°W | Arctic Ocean | |
| 73°22′N 143°0′W / 73.367°N 143°W | Beaufort Sea | |
| 70°5′N 143°0′W / 70.083°N 143°W |  United States |
Alaska |
| 60°5′N 143°0′W / 60.083°N 143°W | Pacific Ocean | Passing just east of Taenga atoll,  French
PolynesiaPassing just west of Nihiru atoll, French
PolynesiaPassing just east of Marutea Nord atoll, French
PolynesiaPassing just east of Reitoru atoll, French
PolynesiaPassing just east of Nukutepipi atoll, French
Polynesia |
| 60°0′S 143°0′W / 60°S 143°W | Southern Ocean | |
| 75°31′S 143°0′W / 75.517°S 143°W | Antarctica | Unclaimed territory |
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