The antisolar point is directly opposite the sun and below the horizon in daytime. It is the home of glories, the heiligenschein, opposition glows, the centre of rainbows, the focus of anticrepuscular rays and of shadows.
These rare ice halos around the aircraft's shadow were produced by Parry oriented crystals and horizontal columns. They are labelled in the 30 million ray HaloSim ray tracing at top left. Oddly enough, antisolar arcs are sharper than their anthelic point counterparts an equal distance above the horizon.