From the 1968 ufo symposium held in the US House of Representitives: UFO Sightings and the Oppositions of Mars. [IN-DEPTH]

https://www.project1947.com/shg/symposium/p238mars.html

This image is an analysis of data from 1947-1957. Looking at the frequency of ufo sightings vs the closeness of Mars to earth.

It’s from the ufo symposium, transcript here http://www.project1947.com/shg/symposium/contents.html

More images from the presentations here https://www.project1947.com/shg/symposium/index2images.html

The data seem to show that there are more ufo sightings when Mars is closer.

I might be misinterpreting this, let me know. Maybe a better way to phrase it is how “visible” Mars is, instead of how “close”.

Edit: the graph is showing the Oppositions of Mars, here’s more on what that means.

Mars opposition occurs when Earth “catches up” to Mars and is positioned between the sun and the Red Planet. During Mars oppositions, from Earth, we can see Mars rise in the east as the sun sets in the west, with the Red Planet being visible in our skies all night long. Such oppositions occur roughly every 26 months.

https://www.space.com/16875-how-far-away-is-mars.html