the first map of the surface of a pulsar

When measuring the weight and proportions of the pulsar, NICER revealed that the shapes and locations of the millions of degree hot spots on the surface of the pulsar are much weirder than it had been supposed. It is specifically a solitary pulsar that is 1,100 light years away in the constellation Pisces: J0030 + 0451 It is about 1.3 times the mass of the Sun, 25.4 kilometers wide and has two hot spots: one small and circular, the other long and half-moon shaped.