Ability To See Satellites From The Ground

It would be really cool to be able to see satellites passing over from the ground. This happens in real life after sunset or before sunrise when satellites that pass over are still illuminated by the sun. Most satellites are quite hard to spot but in a non light polluted area they can still be seen. The International Space Station is the largest object in low earth orbit and can be spotted easily as it passes overhead, even in cities with lots of light pollution. This would be a minor in game detail and I don't imagine it would be too difficult to implement. I believe that Kerbal Space Program has a mod which adds this feature.