Brightness seems to be measured as apparent magnitude but that's denoted by m https://en.wikipedia.org/wiki/Apparent_magnitude https://en.wikipedia.org/wiki/App

Brightness seems to be measured as apparent magnitude but that's denoted by m https://en.wikipedia.org/wiki/Apparent_magnitude https://en.wikipedia.org/wiki/Apparent_magnitude I think G is Stellar Classification https://en.wikipedia.org/wiki/Stellar_classification#Class_G https://en.wikipedia.org/wiki/Stellar_classification#Class_G which would mean this new star is the same class as our Sun.