[plsvn]

Whoops, I goofed. The moon is moving eastwardly into Earth's shadow, so the subtle darkening will first appear on the moon's eastern limb.

To make you feel better, I can never remember which limb is which. If you were standing, say, in the crater Copernicus on the moon and looking towards the direction of the rising sun (on the moon), you would think that the right limb (as we look at it from the earth) would be the eastern limb. But it's not according to convention. I just checked in Menzel's Field Guide, and indeed the left limb of the moon (as we look at it from the Northern Hemisphere) is the "eastern" limb, the limb that first goes into the earth's shadow during a lunar eclipse, as it is right now out my window (well, OK, southeastern limb for this particular eclipse).

[ngc6656]

I just checked in Menzel's Field Guide, and indeed the left limb of the moon (as we look at it from the Northern Hemisphere) is the "eastern" limb, the limb that first goes into the earth's shadow during a lunar eclipse

Thanks for the clarification, plsvn.

The sky cleared at my location. Life is good.