The following image shows trails of SpaceX’s Starlink satellites as seen in the sky above the Cerro Tololo Inter-American Observatory (CTIO) in Chile:
Image Source: SpaceX’s Newly Launched Starlink Satellites Block Galaxy Observation
In the top left corner of the image, it can be seen that two satellites travel in nearly parallel lines and not in coincident lines. Or in other words, it seems that the two satellites travel in two different orbits. What is the reason for this? Why is that one particular satellite not following the queue, even though all satellites have the same orbit parameters (radius, inclination, etc.)?
Here's a zoom in on the upper-left corner:
Here's another image:
Image Source: Elon Musk made a ‘satellite train’ in the night sky – Here’s how to see it
Here, everyone is going in a straight line!
I think Earth's rotation is not the culprit here, because if that was the case, then there should have been a shift for the rest of the satellites in the first image. So, why is there a deviation in one image and not in the other?
Thank you in advance.