A 120° parhelion (plural: 120° parhelia) is a relatively rare halo, an optical phenomenon occasionally appearing along with very bright sun dogs (also called parhelia) when ice crystal-saturated cirrus clouds fill the atmosphere. The 120° parhelia are named for appearing in pair on the parhelic circle ±120° from the sun.[1]
A 120° parhelion (upper spot) depicted in the painting Vädersolstavlan.Faint 120° parhelion on the parhelic circle.
When visible, 120° parhelia appear as white-bluish bright spots on the white parhelic circle and are the product of at least two interior reflections in the hexagonal ice crystals. Their colour together with them being rather obscure can make observing them difficult as they tend to fuse with the clouds in the sky.[2]
A photo of a 120° parhelion in the Czech Republic in October 2006
A photo by Joni Tornambe, 2006
A video from Russia featuring both 120° parhelia, as well as the classic sundogs and parhelic circle, 2007
A similar video from Kazakhstan with very bright 120° parhelia, 2007 Warning: loud audio!
January 01, 1970
parhelion, plural, parhelia, relatively, rare, halo, optical, phenomenon, occasionally, appearing, along, with, very, bright, dogs, also, called, parhelia, when, crystal, saturated, cirrus, clouds, fill, atmosphere, parhelia, named, appearing, pair, parhelic, . A 120 parhelion plural 120 parhelia is a relatively rare halo an optical phenomenon occasionally appearing along with very bright sun dogs also called parhelia when ice crystal saturated cirrus clouds fill the atmosphere The 120 parhelia are named for appearing in pair on the parhelic circle 120 from the sun 1 A 120 parhelion upper spot depicted in the painting Vadersolstavlan Faint 120 parhelion on the parhelic circle When visible 120 parhelia appear as white bluish bright spots on the white parhelic circle and are the product of at least two interior reflections in the hexagonal ice crystals Their colour together with them being rather obscure can make observing them difficult as they tend to fuse with the clouds in the sky 2 See also editLiljequist parhelion Subhelic arcReferences edit 120 Parhelia www paraselene de Retrieved 2009 03 08 including a HaloSim simulation Les Cowley 120 Parhelia Atmospheric Optics Retrieved 2007 04 15 External links editA photo of a 120 parhelion in the Czech Republic in October 2006 A photo by Joni Tornambe 2006 A video from Russia featuring both 120 parhelia as well as the classic sundogs and parhelic circle 2007 A similar video from Kazakhstan with very bright 120 parhelia 2007 Warning loud audio Retrieved from https en wikipedia org w index php title 120 parhelion amp oldid 751997205, wikipedia, wiki, book, books, library,
