A What is the maximal comoving distance that a space probe can reach?

[Omega Force]

What is the maximal comoving distance that a probe can reach depending on its speed?

If the probe travels at light speed, the maximal comoving distance that it can reach is 5 Mpc, which is called the cosmic event horizon. But what if it travels at some other speed?

 

[Jaime Rudas]

If the probe travels at light speed, the maximal comoving distance that it can reach is 5 Mpc, which is called the cosmic event horizon. But what if it travels at some other speed?

If we designate the distance to the event horizon as $D_{eh}$ (which, by the way, is not 5 Mpc, but about 5 Gpc), then the maximal comoving distance that can be reached at speed $v$ is $\frac {v}{c} D_{eh}$