Found my first system with visible motion

[c64orinoco]

I have known that such systems exist, but I have never found one myself. Now I have: HYPOE FLYA GH-V F2

A neutron star in a tight orbit around a black hole. The Neutron Star's orbital period is 0.1 D, about 2.4 hours, so you can actually see the NS moving against background stars. Quite awesome. I would fly close to try to track it's speed, but I am not going anywhere near the damn thing!

Spoiler

 

[AsukaZ]

No need to get close, you can work it out from v = (2 x pi x a)/T

Assuming it's 2 ls out from the centre of rotation, this gives -

(6.28 x 2) / 8640 = 0.0014 ls/s

or approximately 420 km/s