No explanation for the thin “jet” aiming the opposite direction from the tail?
The anti tail is because dust debris and gas gets blown away from the comet body by the solar wind. As the comet comes around the sun the heavier debris blown away follows the orbit of the comet body (rock, dust and ice). As this tail follows around the sun the remains of the old tail are behind and the new tail is blowing ahead of the comet body. In this picture the comet is travelling in the direction of the brightest tail because it is moving away from the sun and the solar wind is blowing the tail out in front of the icy dust ball comet.
When asked about it, Tsuchinshan-Atlas shrugged.
(Okay, stop groaning).