Visibility III / V
I happened to moderate the Observer's observations quite late on 11.11. and I drew my attention to the observation of a comet-like revelation in the northern sky. I ignored the matter at first glance in connection with one of the ongoing air war drills. As several observations surprisedly dropped, the instinct began to say that this was now about something else.
It was clear that the song had traveled slowly over Finland at a pace that did not correspond to a fireball or an airplane.
I immediately researched Kiruna and Plesetsk launch schedules, flight radars, and other standard locations before I was forced to go to sleep. At midnight no explanation was found yet.
Tapio Lahtinen found an explanation for the phenomenon on spaceweather.com in connection with the second observation : " Mystery solved: Earlier in the day, an Atlas V Rocket blasted off from Vandenberg Air Force Base in California carrying the Worldview 4 satellite to Orbit. Later, the rocket's Centaur upper stage vented its excess fuel, creating the ghostly cloud over Sweden. "
The next day I started digging up weather cameras in Tampere Ursa , and that was where it was! Thanks to the association's camera team and Tapsa for digging into the explanation. :)
#raketti: Centaur AV-062