Brief introduction of northern corona constellation

In astrology, there are many classifications of constellations. In addition to the twelve constellations and four constellations that we are familiar with, there are many classifications that ordinary people are more familiar with, such as the eighty-eight constellations. Then, today's constellation knowledge will bring you an introduction to the northern corona, which belongs to the 88 constellations. Let's have a look. Introduction to the Northern Corona Constellation The Northern Corona is one of the stars in the north. The center position is at right ascension 15: 50 and declination 33. The area is about 179 square degrees. Between Capricorn and Wuxian. Near arcturus in Lyra, Vega and Shepherd, there is a 2.4m star, which is the alpha star in the northern corona. The seven little stars on the seat make up a beautiful crown, which is a wedding gift from Dionysus to Ariadne-a crown inlaid with seven gems. Celestial Name: CoronaBorealis Latin abbreviation: CrB symbol: Crown Right ascension: 16h declination +30 area: 179 area ranking: No.73 bright star: 1 brightest star: Guansos (northern corona α) meteor shower: unconnected constellation: Capricorn. 50: 2.2 Apparent magnitude of the brightest star between the total visible areas: There are 29 stars brighter than 6 in the 90° N-50° S block, of which 1 second-class bright star, 4 fourth-class stars, and the rest are all below 5 th-class stars. There are seven main bright stars on the seat, forming a C-shaped recumbent shape. These seven stars are: theta star (Chinese name Guan Suo II, 4. 17, etc. ), beta star (Chinese name Guan Suo III, 3.72, etc. ), alpha star (Chinese name Guan Suo IV, 2.23, etc. ), γ star (Chinese name Guansuo V, 3.93, etc. ) and delta star (Chinese name Guan Suo VI, 4.73, etc. These seven bright stars are shining with white light, much like a gorgeous crown inlaid with precious stones. Counting seven bright stars from the east, three of them are the alpha star in the northern crown (named Guansuo IV in the middle), and the Latin name Gemme, which means the jewel in the crown (also called Alqhecca, meaning broken plate), is the largest and brightest one in the crown. Alpha star is also an eclipse star, and its brightness varies between 2.23-2.2 1. There is a famous cluster of galaxies in the constellation, called the Northern Corona Cluster of Galaxies. There are about 400 galaxies 740 million light-years away from our extinction. In ancient astronomy in China, the northern corona was said to be a prison for prisoners, which was surrounded by nine bright stars, namely π star to ρ star. There is a variable star in the prison, and its brightness will suddenly drop from 5.7 1 to 14.8, which means that its brightness will change thousands of times during the dimming duration of dozens or hundreds of days. This star is yesterday's northern corona. Forty such variable stars have been found in astronomy, but the R star in the northern corona is the most typical one. This R star is almost invisible to the naked eye when it is brightest, and it will be invisible when it is darker. Astronomers in China before the Han Dynasty had noticed this variable star and thought it was a prisoner who was sometimes imprisoned and sometimes released. In our country, people call the northern coronation _ octagonal glazed well.