Lunar Occultation of Mars

There was a lunar occultation of Mars on the evening of 13 January 2025. An luncar occultation is when the disk of the Moon (or Luna) passes in front of a star or planet. This was an easy event to observe with the Moon low in the eastern sky.

The Moon and Mars. Mars has just reappeard from behind the lunar disk.
The Moon and Mars. Mars has just reappeard from behind the lunar disk.

My plan was to shoot several/many images of the ingress and then multiple images of the egress. Unfortunately, most of the images (but not all) were out of focus. I suspect that the rapid cooling of the telephoto lens was the cause of lost focus. Once I noticed the issue and re-focused it stayed in focus.

Time lapse of the Moon and Mars.

I shot images at 3-second intervals as egress started then switched to 30-second intervals. These were assembled into a time-lapse video, shown below.

The next Moon-Mars occultation visible in North America will occur in February, 2042.