Amateurs have been tracking it [0] and even photographing it [1] while in orbit....

Amateurs have been tracking it [0] and even photographing it [1] while in orbit. Any government that has the capability to send satellites to space can do the same.

[0] http://www.space.com/8470-secret-37b-space-plane-spotted-ama...

[1] https://www.universetoday.com/65338/amateur-astronomer-image...