About J0612+37216
J0612+37216 is an uncommon pulsar. It spins once every 443.871 ms, has a dispersion measure of 39.27 pc cm⁻³ and carries a surface magnetic field around 2.61×10^11 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.