What is the exact date when the Milky Way appeared in summer? Want to shoot the earliest Milky Way!

well, this question is actually amateur. Please allow me to explain slowly:

In summer, the Milky Way flows south from between the swan and the lyre, passes through Sagittarius, enters Eagle (a western tributary enters Snake Man), and waits for Scorpio after passing through Shield, which is the brightest place of the Milky Way.

In addition to explaining the general location of the Milky Way in summer, there is also an important message, that is, the Milky Way is a large area, and it will appear slowly, not a sudden change process.

Secondly, I believe the landlord has also heard the word "shifting stars". To put it more academically, it means that the periodic motion of celestial bodies caused by the earth's rotation (the most familiar is the rising of the sun and the setting of the west) is combined with the annual motion caused by the earth's revolution, resulting in the final result that celestial bodies reach the same position four minutes in advance every day.

For example, Lyra will rise at 23: , but a month ago, it was not impossible to see it, but it would have to wait until 1: in the morning. Generally speaking, at the end of February and the beginning of March, you can see the rising Milky Way in the east before dawn.

finally, the landlord's request is unique, but it is actually inappropriate. The closer the galaxy is to the limit condition, the worse the observation condition is. Theoretically, it is possible to challenge the summer galaxy at the end of January, but what's the point? Unless it is to show off the conditions of the observation site and test the photography technology.

according to my personal observation experience, the summer milky way can appear as early as late February and early March. I remember in Dongtan Wetland, watching the Milky Way rise in the air in the middle of the night, spanning the Yangtze River, and the world and the water complement each other. This scenery is amazing and shocking, and it was sealed into my memories of youth after being processed.