Hi Sam it usually depends on the a couple of main things ,
one the hight of the satellite and two how far the Sun is below the horizon.
when the satellite goes into the earth's shadow the the satellite will go
gradually dimmer and then go out of view.
sometimes you can follow the satellite from horizon to horizon.
The higher a satellite is the later in the night you may be able to see it ,but these are only faint and can be seen in your telescope or binoculars.
cheers
