Several minutes for craft to transit sky. Contrails would have disappeared quickly in dry environment. This remained and drifted for 1/2 hour or more. Third pic is of eastern sky after craft exited on western horizon.
Several minutes for craft to transit sky. Contrails would have disappeared quickly in dry environment. This remained and drifted for 1/2 hour or more. Third pic is of eastern sky after craft exited on western horizon.