Circumscribed Lunar Halo

This was a very distinct halo in moonlight, the exposure of about a minute was long enough to show some colour. In the left image the head of Leo is visible through the edge of the halo. In the right image the upper and lower tanger arcs have joined to form a distinct elliptical circumscribed halo, outside the circular 22 degree halo. Castor and Pollux, in Gemini, are the two bright stars to the upper right of the moon.

	This slightly longer exposure clearly shows the colour in the upper tangent arc. The 22 degree halo is faintly visible on the lower right, the brighter tangent arc splits away from it just to the right of the two bright stars. The lower level cloud streaks at the bottom left moved in and ended the display a few minutes later.