Details

• White charcoal on black art paper.
• Drawn from a photograph taken on 19th December 2023

Notes

Photographed with the Moon at first quarter at precisely the day/time that this transient effect is visible. I was looking along the terminator and attempting to identify some of the prominent craters when all of a sudden this jumped out at me. I swear that if I had tried to find it it would have taken hours! The effect is actually only visible for approx four hours or so on one day a month when the Moon is at first quarter (lunar day 6.9). The next date it is visible is the 17th March by my calculation. The photo was a little out of focus so a sketch seemed to be the best way to record it.