general situation
Pronunciation x and nüuèr
Antares, the alpha star of Scorpio (the main star of Scorpio), also known as fire in ancient China, belongs to the seven-night antares in the Eastern Black Dragon (Antares has three stars, namely Scorpio σ, α, τ, also known as Samsung), and is used to determine the seasons. Antares is the15th bright star in the whole day, which is a visual binary star. The magnitude of the main star is 1.2, and the red giant with M 1I is 6000 times the brightness of the sun. The companion star is a blue dwarf star with brightness of 5.4 and angular distance of 3 ". The synthetic magnitude is 0.96 and the absolute magnitude is -4.7. 600 light years away.
The main star of Antares is actually a semi-regular variable star, with a brightness of 0.9 to 1.8 and a dimming period of 48 years. The surface temperature is 3600K, the radius is 700 times that of the sun, the surface area is 360000 times that of the sun, and the mass is 15.5 times that of the sun.
AntAres, the English name of AntAres, is a combination of Anti and ares. Ares is the name of God of War and Mars in Greek mythology, which means "the enemy of Mars". Because the brightness and color of Antares are very similar to those of Mars, and the orbits of both stars are on the ecliptic, when Mars runs to Scorpio, two red stars shine in the sky, so Antares is named. In ancient Persia, Antares, Bi Suwu, Xuanyuan XIV and Beiluoshimen were collectively called the four heavenly kings.
"Fire in July" means that Mars is heading west and the weather is cold. Modern astronomy is called "Alpha Star of Scorpio". This is a red Supergiant star. It is a semi-regular variable star with obvious light, which forms a visual binary system with a blue dwarf. Antares or radio sources.
[Edit this paragraph] Observe
"Fire in July" means that Mars is heading west and the weather is cold. Modern astronomy is called "Alpha Star of Scorpio". This is a red Supergiant star. Antares and another blue dwarf star with a visual magnitude of about 5 and MK classification of about B4V form a visual binary star with an orbital period of thousands of years. The blue companion star of Antares is a radio star, which was discovered in 1970s. The radio of blue companion antares and the radio of red Supergiant star antares and their brightness are all measured by very large antenna arrays. It is also found that the radio source near the blue companion star is actually located between the two satellites, which may be formed by the wind interaction between the two stars.
Legend has it that when China was in Zhuan Xu more than 4,000 years ago, he set up an official post of Huozheng, who was responsible for observing this star.
Red, magnitude 0.92, distance about 600 light years. Its radius is 700 times that of the sun, reaching 4170,000 km. The surface temperature is 3000 degrees, the volume is more than 200 million times that of the sun, and the mass is 15.5 times that of the sun. So the density is only 8.6 million times that of the sun.
Location: Right ascension 16: 26.3, declination -26 degrees 19.
[Edit this paragraph] Observation data
Era J2000
Scorpius
Guan xing Xin su
Right ascension 16 hours, 29 minutes and 24.5 seconds
Declination-26 25' 55.2 "
Apparent magnitude (V) 0.9 ~ 1.8
characteristic
Spectral classification m1.5iab-b/b2.5v.
B-V color index 1.86
U-B color index 1.34
Variable star LC type irregularity
Astrometry
Radial velocity (Rv)? 3.4 km/s
Self (μ) RA:？ 10. 16 MAS/ year
December: 23.2 1 quality/year
Parallax (π)5.40 1.68 mas
The distance is about 0.600 Li.
(about. 190 computers)
Absolute magnitude (MV)? 5.29
give exact information
Mass15.5m ⅷ
The radius is 700 R⊙ⅷ.
Brightness 65000 L⊙ VIII
Temperature 3500 K