Passage: The star is thought to have ejected almost 10 solar masses of material in giant outbursts perhaps 4,000 to 6,000 years ago (as observed from Earth).  Its stellar wind is over 10 billion times stronger than the Sun's.  Its 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.  The mass is equally uncertain, thought to have been over 100 times the Sun when initially formed but now considerably less due to extreme mass loss.  Modelling the star itself to match its spectrum gives a mass of 27.5 M☉, while matching its current properties to an evolutionary model gives a much higher mass (86-92 M☉).Later studies have reduced its estimated luminosity making it a candidate luminous blue variable about one-third as luminous as the binary star system Eta Carinae.  Even so, it radiates about as much energy in 20 seconds as the Sun does in a year.

Question: When did the star have a giant outburst of material?
4,000 to 6,000 years ago