NGC 592-WR2 was one of the four Wolf-Rayet stars discovered in the NGC 592 region. It was first discovered back in the early 2000s along with the three other stars using the Hubble Space Telescope. It had a spectral class of WN4. NGC 592-WR2 had a surface temperature of around 65000K, a radius of around 2.4 Earth radii and a mass of 15 solar masses. It rotated roughly every 420 seconds and had a rotational velocity of around 200km/s.

WR2 Event and aftermath

About 48 hours prior to the collpase of WR2, noticable dimming and brightenning events were observed with the Luonnotar Astronomical Space Telescope (LAST). These events were occuring in the near infrared and the visible spectrum, suggesting that mulitple quakes were occuring across the surface of the star. They were occuring at roughly one hour intervals, which then increased to roughly 15-25 second intervals 7 hours before collpase. 20 hours before the event, multiple advisories were given out to the govenments across Luonnotar to prepare for a possible stellar collapse within the next 24 hours, requiring that at least 50% of the country's population be ready to be evacuated off Luonnotar within that time. Previous observations has shown that WR2's rotational axis is very closely aligned with Luonnotar, and because WR2 is within 200 lightyears, if WR2 were to collapse and produce a gamma-ray burst, Luonnotar could experience devastating effects. Ozone in the atmosphere could drop by as much as 45%, radiation could reach dangerous levels sterilizing the surface within days, and the formation of nitrogen oxides will cause global cooling and acid rain. At the time of collpase, WR2 brightened from a magnitude +2.5 to a magnitude -10.2 within 7 seconds, making it visible even during day time. Many electrical devices were damaged and rendered inoperable, causing satellites, transport and services to either slow or completely stop operations. Sensors detected very rapid drops in Ozone, increase in nitrogen oxides and a 10 times increase in radiation levels. Ships immediately began to depart Luonnotar, with roughly 2 million people evacuated. However, a million people were left stranded on Luonnotar due to limited space and supplies on the ships. Roughly 70% of the people died due to cancer and radiation poisoning, with most of the remaining survivors succumbing to hunger and hypothermia. There could be less than a hundred survivors on Luonnotar.