About J1244-5053
J1244-5053 is an uncommon pulsar. It spins once every 275.207 ms, has a dispersion measure of 109.95 pc cm⁻³ and carries a surface magnetic field around 5.31×10^11 G.
The collapsed core of a star that exploded: about one and a half Suns of matter crushed into a ball the size of a city, held up only by the refusal of neutrons to be squeezed further.