Pistol Star
The star may have ejected almost 10 solar masses of material in giant outbursts perhaps 4,000 to 6,000 years ago. Its stellar wind is over 10 billion times stronger than the Sun's. The star's exact age and future are not known, but it is expected to end in a brilliant supernova or hypernova in 1 to 3 million years. Its mass is equally uncertain, probably around 200 times the sun when first formed. Now it is much less because it has lost so much mass.