Quadrilateral constellation

The main body of Orion consists of four bright stars, Betelgeuse and Betelgeuse, forming a quadrilateral. There are many bright stars and deep space objects in this constellation. Here are some of its stars:

1, Ikuichi (Orion λ): It is a star in Orion with apparent magnitude of 3.54, located at longitude 195.05, latitude-12, and its coordinate B 1900.0 is 5h right ascension. 29m？ 37.7 degrees, declination +9 degrees? - 12′? "2" is the head of Orion.

Betelgeuse: Orion's right shoulder is a red Supergiant star-its diameter is larger than Jupiter's orbit. It actually has five other companion stars, but they are all too small to see. Betelgeuse, Nanhe III and Sirius form the winter triangle.

3. Betelgeuse: also known as Orion γ, is a star in Orion, located 5 degrees west of Betelgeuse (Orion α). This is Orion's left shoulder.

4. Betelgeuse 1, Betelgeuse 2 and mintaka are the belts of Orion: three bright stars are connected in a line from east to west, and it is easy to recognize Orion.

Betelgeuse is the sixth bright star of Orion, commonly known as Saif. Its name comes from Arabic saif al jabbar, which literally means the sword of the giant. Betelgeuse is located in the southwest corner of Orion quadrilateral. Located on the right knee of Orion.

6. Betelgeuse: Located at the left ankle of Orion, it is a big white star. It is the seventh brightest star in the whole day. It has three invisible companion stars.

Extended data:

Deep space objects—

Orion's sword hangs on his belt, which is composed of tetrads (Orion θ 1 and Orion θ2) and the Great Orion Nebula (M42). It is called the cutting star in China. Even with the naked eye, it can be clearly recognized that this magnificent celestial body is not a star; If we use binoculars, we can see its young star, glowing gas and dust.

Another famous nebula is the Horsehead Nebula (IC 434) located in Orion ζ. Its name comes from a cloud of black dust that looks like a horsehead. If you observe Orion with a small telescope, you can see more interesting deep space objects.

Baidu Encyclopedia-Orion