The first province to see the sunrise at the autumnal equinox.

The first province to see the sunrise in the autumnal equinox: Heilongjiang Province.

The autumnal equinox is an important solar term among the traditional 24 solar terms in China, usually on September 22nd or 23rd every year. On the day of the autumnal equinox, day and night are equally divided, and the sun shines directly on the equator. This is a sign that day and night are equally divided and autumn officially begins. But which province can see the sunrise at the earliest is related to geographical location, season, topography and other factors.

In China, Saertu District, Daqing City, Heilongjiang Province, located at 73.66 degrees east longitude and 42.05 degrees north latitude, it has the reputation of "the first sunrise town in China". The geographical location of this area is unique, located in the north of Qiqihar City, east longitude 126 degrees. This geographical location determines that the autumnal equinox sunrise time in Daqing is earlier.

At the autumnal equinox, the angle between the earth's rotation axis and the orbital plane is zero, so the sun's rays pass through the equator vertically. At this time, the direct point of the sun is located at a point south of the equator in the northern hemisphere. Due to the rotation of the earth, the time to watch the sunrise in different longitude areas will be different.

Daqing is located at east longitude 126 degrees. Compared with other parts of China, the sun rises earlier at the autumnal equinox. Of course, this time is not absolute, and the specific sunrise time is also affected by meteorological conditions, seasonal changes, topography and other factors.

In modern society, the development of science and technology enables people to accurately predict the sunrise time. No matter which province, through astronomical calculation and meteorological observation, we can accurately know the sunrise time at the autumnal equinox. People can also use various devices, such as mobile phone applications or Internet observatories, to get the sunrise time of their place conveniently.