SiriusDoggy wrote in post #19407600
Satellites can also show variable brightness. Some sats are tumblers or slow rotators that vary their brightness. Also, when a satellite first comes into or out of the reflection path of the sun it can ramp up or down in brightness.
Totally agree with your statement, but, if you look on the second picture (right under airplane traces) you will see real satellite trace. That what meant in my fist comment. On the first picture I see exposure time was 5sec. Let assume satellites (in most) orbiting the Earth at ~240km above sea level at speed ~7.7km/sec. For 5sec it moves ~38.5km (again, it is very rough calculation). Now, we have triangle with sides 240km, 38.5km, 240km. Knowing three triangle sides calculation says: the angle satellite moves for 5sec will be roughly 9.2 degrees. Fool Moon angle size is ~ 0.5 degrees. So, regardless of brightness change, the satellite will make the trace of 18 Moons in length! Obviously, it did not happened on the first picture. that is why I was leaning toward meteorite version.