A slightly shaded full moon – a very slight lunar eclipse

Tonight, the Earth partially blocked the Sun, as seen from the Moon, causing a slight shading on the southern part of the moon. Here are two photos – one taken during the ‘darkest’ part of the eclipse and another an hour later after the Moon was almost all of the way outside the partial Earth shadow.
I posted info about this at the Westchester Astronomers’ Facebook page.

Faint shadow of Earth on the southern (lower) part of the Full Moon.

Faint shadow of Earth on the southern (lower right) part of the Full Moon.

Full Moon after faint shadow of the Earth mostly gone. One hour after previous photo, with the same exposure.

Full Moon after faint shadow of the Earth mostly gone. One hour after previous photo, with the same exposure.


Second photo is brighter than the first for two reasons – first because the Earth shadow is mostly gone, second because the Moon is higher in the sky an hour later and it is brighter overall because the moonlight is traveling through less of the Earth’s atmosphere.

But note that the second photo, after the eclipse is mostly over, shows no change in brightness across the Moon, unlike the first photo, which shows shading on the southern (lower) side of the Moon.
So, here’s a shorter exposure, which shows no shading on the Moon.

Shorter exposure, also taken after the eclipse, showing no shading on the Moon

Shorter exposure, showing no shading on the Moon

View from the Moon’s point of view, from solar system simulator….

from space.jpl.nasa.gov

from space.jpl.nasa.gov

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