When does the direct point of the sun directly hit the equator?

At the vernal equinox (March 2 1 or so), the direct point of the sun is at the equator (0).

At the autumnal equinox (around September 23rd), the direct point of the sun is at the equator (0).

The meridian where the direct point of the sun is located is 12 noon. The law of activity is: at the vernal equinox (March 2 1 or so), the direct point of the sun is at the equator (0), and then it moves north. During the summer solstice (around June 22nd), the direct point of the sun is on the tropic of cancer (23 26 ′ N), and then moves south. At the autumnal equinox (around September 23rd), the direct point of the sun is at the equator (0), and then it continues to move south. During the winter solstice (around 65438+February 22nd), the direct point of the sun is on the tropic of Capricorn (23 26), and then moves northward.

Extended data:

With the earth as the reference, the direct point of the sun always moves westward, passing through longitude 15 degrees every hour. The seasonal movement of the sun's direct point causes the change of global heat distribution. The seasonal movement of the direct point of the sun drives the north-south deviation of the planetary wind system. The change of the sun's direct point forms the global seasonal change and the alternation of day and night.

A simple method to calculate the latitude of the sun's direct point: the latitude of the direct point = 90-(local noon sun height angle+local latitude) is negative, then the sun's direct point is at the same latitude in the local hemisphere.

References:

Baidu encyclopedia sun direct point