First Panu Lahtinen thought he had seen the 120 deg sub-parhelia, but
after consulting Jarmo Moilanen, who noticed the shadow of the airplane,
the halo was identified to be “only” a sub-anthelion with a short
sub-parhelic circle attached to it. No other halos were seen. ( 1 – 2 – 3 )
The halos were seen on a flight from Helsinki to Ivalo on July 21, 2009
at 17:40 local time, and they were visible only for approximately 10-15
seconds.
Again I wonder why that sub-120 is so cryptic.
The thing lasted only 10-15 seconds. You probably had camera ready?
I always have my DSLR with me when in-flight 😉 There was a glory visible a few moments earlier, so I already had the lens cap off and the camera at hand.