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Hi Michael and all,
>
> Yes there is heliac arc too. It is better in
> that one (100-0007) photo which is taken up
> right from the moon.
>
> We have allready check those Arto Oksanen's
> photos and this Great Lunar Display seem to has
> at least these halos:
> (sorry, that I do not use those "selene"-names)
>
> Easy to see in photos:
> - 220 halo
> - 220 tangent arcs
> - parhelia
> - sun pillar
> - 460 halo
> - parhelic circle
> - infralateral arcs
> - (upper suncave)Parry arc
> - Wegener arcs
> - subhelic arc
> - Greenler (diffuse) anthelic arcs
> - (anthelion)
>
> Not so easy to see (need some unsharp mask to
> see clearly):
> - heliac arc (100-0001, 100-0007)
> - lower sunvex Parry arc (100-0008, 100-0009)
> - lower Tape arcs (or lower Parry infralateral
> arcs)at least in 100-0013 it seems to be have
> some curvature. In others it is more or less
> just not so convincing brightening on
> infralateral arc.
>
> In one photo there is weak arc which may be a
> halo or not. If it is a halo, it is subanthelic
> arc.
>
> In car's head light photos 100-0020...100-0022
> that Y-shaped pillar is in matter of fact 220
> tangent arc. In photos 100-0022 and
> 100-0028..29 those horisontal "light beams"
> from the lamps are parhelia.
>
> In photo 100-0003 there is this diffuse X-shape
> system. It is possible (we do not know for sure
> yet) that it is compination of Greenler
> (diffuse) anthelic arcs and Tricker arcs formed
> by car's head lights! There is in matter of
> fact two Xs in that picture. There is also a
> narrow white arc in right lower corner which
> seems to be also formed by car's head lights.
> It may be Wegener arc or subhelic arc or
> something else. Identification is not sure yet.
>
> Jarmo Moilanen
> Finish Halo Observers Network
Jarmo,
In the very first image if you look at the
lower tangent closely you can see a lower convex
parry arc. Its visible as a faint inverted V
shaped arc inside the bright lower tangent arc.
All of the best,
Michael
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