About J1941+1026
J1941+1026 is an uncommon pulsar. It spins once every 905.394 ms, has a dispersion measure of 138.91 pc cm⁻³ and carries a surface magnetic field around 9.61×10^11 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.