Tuesday 10 January 2017

The Terminator


Taken from our Backyard with A QHY5LII planetary camera fixed to a 66mm. Altair Starwave ED Doublet Refractor all mounted on on a Star Adventurer Mount.


The Moon was waxing gibbous last night when I took this image with my small imaging rig. The 'terminator' is the line between light and dark on the surface of the Moon.  Put another way, on the waxing Moon the 'terminator' is the location of sunrise and on a waning Moon the location of sunset. The 'terminator' sweeps across the lunar surface at 9.6 mph (15.4 km/h). In the above image the 'terminator' runs from bottom left to top right.
The ejector ray systems associated with the craters Copernicus and Kepler are very easy to see and the wall of the crater Aristarchus shines bright under full illumination on the terminator.

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