Greyhound 1-48

Greyhound 1-48 (QR Camelopardalis) is an O-Type Hypergiant in the Greyhound 1 Cluster. It is one of the most massive stars in the Milky Way.

Properties
Greyhound 1-48 is one of the most extreme stars in the Milky Way. It is one of the most massive main-sequence stars in the Milky Way. It is also has been studied due to it's extreme rarity.

It's spectral class is O1f, corresponding to a temperature of 52,000 K. It's spectrum has emission lines of both Helium and Nitrogen. It also has a mass of at least 60-75 solar masses. Making it extremely massive for a main sequence star. It is also very large, at 40-50 solar radii. It is also classified as a Hypergiant, Due to being way too luminous for an O-Type Supergiant. Due to it's extreme luminosity, it is one of the most luminous stars in the Milky Way, even surpassing R136a1 (although in the Large Magellanic Cloud).

It also has a very low metallicity, compared to the Sun. Making it a Population II Star. However, it is very unusual for an unusually young star like Greyhound 1-48. It is also extremely unusual, given that the star was formed from a Population I Star, Which suggests that Greyhound 1-48 barely got any metals, compared to the other stars in Greyhound 1. In a few ten thousand years, It is expected to directly collapse into a black hole, without any supernova.

Greyhound 1-48 is also shedding it's mass at a very fast speed. It's mass loss rate is 0.0005 solar masses/year. Which forms a nebula called, QR Camelopardalis Nebula.

Greyhound 1-48 is also a Blue large-amplitude pulsator, which are an extremely rare class of variable stars, characterized by pulsations of between 0.19-0.36 magnitudes, between 22-39 minutes.

Greyhound 1-48's supposed apparent magnitude is 1.52, making it a second magnitude star. However, due to the dust clouds and the nebula surrounding it. It's apparent magnitude has been dropped to 7.5. making it almost invisible to the naked eye.

Location
Greyhound 1-48 is east of Greyhound 1-3 and southeast of Greyhound 1-49, it is also west of Greyhound 1-51, one of the largest stars in the Milky Way.