two tails of comet 46P
On the night of December 14, I used a telescope to track Comet 46P/Wirtanen. In this photo with a cumulative exposure time of 100 minutes, you can see two long tails pulled from the both side of the coma. The one on the right is the normal tail opposite the direction of the sun. The one on the left should be a rare antitail.
The halo in the upper left corner should be the glare in the telescope, not the real structure.