Applied Optics · 1994 · 10 citations · 1 references
Astronomical Coordinate SystemPhotometryFinnish Amateur AstronomersAstrostatisticsElliptical HalosUrsa Astronomical AssociationAstroinformaticsAstronomical Image AnalysisElliptical Halo DisplaysAstrophysics
The Finnish Amateur Astronomers' Network, working under the Ursa Astronomical Association, has photographed several vertically elliptical halo displays. Four of these observations with photographs are presented.
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