Last night, I saw a red star in the southern sky. What star is it?

Through the description of the landlord, it can be basically determined that this star is the main star of Scorpio and antares. The first is color. Antares is a famous red Supergiant star. For those unfamiliar with astronomy, they can only see a few red stars. The second is brightness. Antares is a first-class star with a brightness of 0.96, ranking 15 in the whole day. Even in big cities with serious light damage, it is not difficult to observe. One more trick. The stars blink because they are far away and have a small angle of view. Of course, there are several bright stars, that is, Jin Mu's five elements of fire, water and soil. All five planets can see round faces in the telescope, so they don't blink. This clue can confirm that this is a star. There is also a dark star, antares is one of the 28 places, and around antares, antares I and III are also bright stars. In the city, it is normal for the naked eye not to adapt to the darkness. Finally, I want to confirm with the landlord that the landlord is not looking east, but south. At that time, the Ran Ran rose in the autumn sky in the east, and there were not many bright stars, not to mention the celestial bodies with red light and two nearby darker stars. So I made this speculation that the landlord's judgment on the direction was wrong. The following is Stellarium's simulation of the Shanghai sky last night. You can see that at 2 1 point, Antares is already in the southwest sky.