Advances in Astronomy / 2010 / Article / Fig 1

Research Article

Automated Observations of the Earthshine

Figure 1

The moon showing the brightside and the earthshine. The Grimaldi side is in the moonshine (brightside) and the Crisium side is in the earthshine. Our ten highlands fiducial patches used in the observations made from BBSO are indicated. The crosses give the approximate positions of Danjon's [3, 4] fiducial patches. Goode et al. [11] used one fiducial patch on each side, and on the Crisium side it is the one closest to the white cross, while on the Grimaldi side, it is the one immediately above the black cross. In the image, the lunar phase is 115 .9, near a declining quarter moon. Unlike the moonshine, the earthshine is flat across the disk. The flatness is due to the uniform, incoherent back-scattering (non-Lambertian), in contrast to the forward scattering of sunlight occurring in the sunlit lunar crescent surface.
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