Feb 122026
 
Click image to see original version. Then press F11 for full screen and Ctrl+wheel to zoom in.

I was just setting up on AR4373 when this jet flew over. The funny thing is that the contrail is nearly transparent. All the others I have captured are like black smoke trails. (the fuzzy shadow is a tree branch – Sun is still pretty low at 57N)

UPDATE: Closer inspection in slomo shows it is actually a plane with propellors which maybe explains the mystery. See video below.

Click image to see original version. Then press F11 for full screen and Ctrl+wheel to zoom in.
 Posted by at 12:59 pm