PSR J0751+1807 A is an exceptionally fast pulsar rotating thousands of times per second, or rather, once every 3.48 milliseconds. It has a high density of 4.5 solar masses and sits 80.6 ls away from its A class binary relative.

The orbital period between these two stars is estimated to be anywhere between 6 hours and 8.6 days, as initially observed by the lack of eclipse or propagation delays varying with orbital phase.

The speed at which this pulsar rotates creates an astonishing surface temperature of 554,840,192 Kelvin.

In the same system, 12,514 ls away, you will find another binary neutron star with opposite behavior of the main pulsar. PSR J0751+1807 C has a surface temperature of 3,800,591 Kelvin, making it extremely faint and cold for a neutron star.

At 1.4 solar masses, visiting explorers can choose to ride this calmer neutron boost, or jump into the primary pulsar's tail for a thrilling, bumpy ride.

This pair was first observed and studied by the Keck Observatory in Hawaii.

Source: Astrophysical Journal v.453