Brief introduction of Vela and the best observation time

Keep looking down. Sagittarius is a part of ancient South Sagittarius. 1750, Llakaj divided ancient southern Sagittarius into four small constellations, namely Sagittarius, tail, carina and compass. Sagittarius is located between Sagittarius, Centauri and stern in the Milky Way, at 7: 40 right ascension and at -33 declination. At 8: 00 p.m. on April 10 every year, Vela is located in the upper transit. L2 in the constellation is a long-period variable star with a period of 140 days. ζ star is one of the famous hot stars, the surface temperature can reach 25,000 degrees, and there are 15 stars in the constellation brighter than Grade 4. The explosion of the Vela supernova is long over, but its influence continues. Celestial name: Velorum Latin name: Vel symbol: sail right ascension: 9h declination: -50 area: 500 area ranking: 32nd brightest star number: 5 brightest star: Vela delta meteor shower: adjacent constellations: pump, compass, tail and carina. The best observation time of Centauri: the best observation latitude in March: the magnitude of the brightest star between+30 and-90: 1.6 genus: Velorum fully visible area: 39° N-90° S constellation description center position: 9: 40 right ascension,-47 right declination. North of carina, in the Milky Way between Centauri and stern. Among them, there are 146 stars brighter than 6-magnitude stars, including 3 second-magnitude stars, 2 third-magnitude stars and 14 fourth-magnitude stars. Every April 10 at 8: 00 pm, Sagittarius (Tianshe I) is an optical binary star with magnitude 1.8. It is one of the famous hot stars, and its surface temperature is about 25,000 degrees Celsius. Its sub-star γ2 has a magnitude of 1.78, which is 800 light years away from us and is one of the brightest 200 stars in the whole day. Another sub-star, γ 1, has an apparent magnitude of 4.27, and is a blue-and-white sub-giant of type B1Ⅳ. The angular distance between two stars is 41".2". Daughter star γ2 is the brightest Wolf-Rayet stars in the whole day. Wolf-Rayet stars is a special type of star discovered by French astronomers Wolff and La Yexing in Cygnus on 1867. There are many broad emission lines in their spectra. Later, it was observed that Tian She-1 was a tetrad star, and the other two subsatellites were 8.5 and 9.4 respectively.