# Distance between Perth, Australia and the Equator

During our calculation of the distance to the Equator we made three assumptions.

1) We assumed a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance was
calculated as *great-circle* or *orthodromic distance* on the surface of a sphere.

2) For each city we chose a particular point inside the city as the "city centre" and calculated the distances
using the coordinates of these "city centres". Real distances to other points inside or near the city,
for example, to its airport, will differ from our calculation.

3) We calculate the distance between a point on the Earth's surface and the Equator as the length
of the arc of the meridian passing through this point and crossing the Equator.

Find out the distance between Perth and the North Pole, the South Pole, the Tropic of Cancer, the Tropic of Capricorn, the Arctic Circle, the Antarctic Circle

Find out the distance between Perth and other cities

## Perth, Australia: basic facts and figures

Perth coordinates: 31°57′08″ S, 115°51′41″ E

Population: 1,896,548

Find out what time it is in Perth right now

See the map of Perth

Wikipedia article: Perth

## The Equator: basic facts and figures

The Equator is the longest circle of latitude or parallel on the Earth's surface.

The latitude of each point on the Equator equals 0°.

The Equator divides the Earth's surface into the Northern and the Southern Hemispheres.

The points that lie north of the Equator belong to the Northern Hemisphere.

The points that lie south of the Equator belong to the Southern Hemisphere.

Wikipedia article: the Equator