Antipode of Bilma, Niger
The opposite side of the world to Bilma is Alofi, Niue.
Bilma
Niger
Continent: Africa
Coordinates: 18.685, 12.916
Antipodal point
Opposite side in the world
Continent: Africa
Coordinates: -18.685, -167.084
Alofi
Niue
Alofi is the closest city to Bilma's antipodal point (301 km).
The antipodal city to Bilma is Alofi. This means that, among all the populated locations in the world, the farthest city from Bilma is Alofi.
The distance from Bilma to Alofi is about 20,000 kilometers. A direct flight would take around 22 hours, but there aren't commercial routes between these cities.
Cities on the other side of the world of Bilma
This table contains the populated locations that are closest to Bilma's antipode. These are the farthest cities in the world from Bilma.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| Alofi | Niue | 301 km | (-19.055, -169.918) |
| Ta`ū, Manu'a | American Samoa | 557 km | (-14.234, -169.514) |
| Faleāsao, Manu'a | American Samoa | 558 km | (-14.222, -169.513) |
| Ofu, Manu'a | American Samoa | 571 km | (-14.175, -169.678) |
| Alao, Eastern District | American Samoa | 614 km | (-14.268, -170.564) |
| Vaitogi, Western District | American Samoa | 617 km | (-14.359, -170.735) |
| Tāfuna, Western District | American Samoa | 618 km | (-14.336, -170.720) |
| Taputimu, Western District | American Samoa | 620 km | (-14.360, -170.773) |
| Aūa, Eastern District | American Samoa | 620 km | (-14.276, -170.664) |
| Āfono, Eastern District | American Samoa | 620 km | (-14.264, -170.651) |
Bilma, Niger
Local time:
Coordinates: 18.6853° N 12.9164° E
Alofi, Niue
Local time:
Coordinates: 19.0545° S 169.9177° W
How to calculate the antipodal point?
The antipode can be calculated by understanding the geographic coordinates and applying simple formulas. We will use the following variables:
- LatO: Latitude at the origin point.
- LngO: Longitude at the origin point.
- LatA: Latitude at the antipodal point.
- LngA: Longitude at the antipodal point.
Step 1: Obtain the geographic coordinates of Bilma
The DMS coordinates are: 18°41'7.2'' N 12°54'59.1'' E .
Calculations are easier by using the decimal format, hence:
LatO = 18.68532°
LngO = 12.91643°
Step 2: Calculate the latitude
LatA = - LatO = -18.68532°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = 12.91643 - 180° = -167.08357°
Since the longitude is positive, we subtract 180° to ensure the final value lies between (-180, 180). If it were the other way around, we would sum 180° for the same reason.
Result:
The antipode of Bilma is located on coordinates: (LatA, LngA) = (-18.68532, -167.08357)
In DMS format: 18°41'7.2'' N 12°54'59.1'' E .
