Room fire pig constellation

Located in Xuanwu District of Gong Bei, Beiluoshimen is the main star of Pisces (Alpha Pisces), about 25. 1 light-year away from the Earth. The apparent magnitude on the earth is 1. 16, which is the17th bright star that can be seen on the earth except the sun.

The spectral classification of Beiluoshimen is A3V, its diameter is about 1.7 times that of the sun, its mass is about 2.3 times, and its brightness is about 15 times. It is only about 200 million to 300 million years old and is a very young star.

Around Beiluoshimen, there is a disk-shaped dust cloud at the distance of 133 to 158 astronomical units. 1998, through observation and speculation, people think that planets are likely to be produced in dust clouds.

There is a known planet in North Fukushima, Nobukuro Shimen B. In May 2008, astronomer Paul Callas of the University of California, Berkeley successfully located the planet from photos taken by the Hubble Space Telescope between 2006 and 2008. The image of the planet was released in June 2008165438+1October 65438+March.

The size of Beiluoshimen B is similar to Jupiter, and its mass is between 0.054 and 3 times that of Jupiter, between Neptune and three Jupiter. The distance from Beiluoximen B to Beiluoximen is about 654.38+0.7 billion kilometers, which is about 872 years in period of revolution.