What are the basic characteristics of Haishan 2?

EtaCarinae, called η carina in the west, is a bright blue variable star with very high quality, which may be a binary star system. The mass is about 150 times that of the sun, and the brightness is about 5 million times that of the sun. 7500 light years away from the earth. Then follow the astronomical phenomenon to understand what are the basic characteristics of Haishan 2?

Haishan 2, known as η star in the west, is a bright blue variable star with very high quality, which may be a binary star system. The mass is about 150 times that of the sun, and the brightness is about 5 million times that of the sun. 7500 light years away from the earth.

The activity is extremely unstable, and there are often large explosions, during which even its shape will change from round to dumbbell. This image obtained by complex image processing in 1996 can show the subtle parts of the clouds around the naughty star, including two clear circular protrusions, a hot central area and some strange radial stripes. Two circular protrusions filled with gas and dust are absorbing blue light and ultraviolet light in the central area. Those strange radial stripes still can't explain? Maybe these clues will tell us how the nebula formed. Or maybe it's a hint when Italy, our carina, will break out.

Classification of basic characteristic spectrum: B3-5Ia0+wc7p(B-V color index 0.6 1, U-B color index -0.45) Variable star type: bright blue variable star, binary star or compound star astrometry: radial velocity (Rv)? 25.0km/s, self-propelled (μ)RA:? 7.6mas/yr， DEC: 1.0mas/yr mass:100-120m _ (a)+38-50m _ (b) radius: 240r _ (a)+100r _ (b) 000. 8000 kb:35000k Other names: Kong, tse59 2620, HD93308, SAO238429, WDS/KOOC-0/045/KOOC-0/-594/KOOC-0/,IRAS/KOOC-0/043/KOOC-.

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