Basically, the camera is moving from roughly behind the object to roughly in front of it, so the object is travelling backwards relative to the camera (but continues to advance along its heliocentric trajectory).
Thanks. However, the appearance of moving backwards is also in relation to the planets in the inner Solar System.
I would like to see an interactive version where you could vary the angle and distance including zoom.
I was puzzled by the fact it came so close to the Sun to be bent around to curve back its trajectory. This has the effect of increasing the time it spends in the Solar System. But you could argue it came close enough to the Earth to be discovered which makes it likelier to get close to the Sun.
But it also seemed to get close to Jupiter at about the 1:06 point in the video. Jupiter has an 11 year period. It’s not likely it should get close to both Earth and Jupiter. However, because of the angle shown you can’t tell how far it is above the orbital plane during the Jupiter pass. I think it is actually high above the ecliptic during the Jupiter pass, judging from later viewpoints in the video. So it may be further away from Jupiter than it appears. This is another reason why an interactive video would be useful to answer this question.
It also seems to get close to Mars at about the 1:40 point. But again this is hard to tell because of the angle. An interactive video would be helpful here again as well.
Close passes by Jupiter, the Sun, Earth, and Mars. That can’t be right can it?