UFO vs Venus-Earth Proximity
For about 17,500 UFO sightings with known dates, the Heliocentric Longitude of Earth and Venus are compared.The DIFFERENCE between these longitudes is divided into 24 "zones" of 15 degrees each. Earth and Venus are closest in zone 12 ( yellow bar ). UFO Sightings at these time increment the height of the corresponding bar.
"Zone zero" sightings occur when they are on opposite sides of the sun.
The influence of Venus is diminished in zone 12, a sliver of light at most, and lost in the Sun's glare.
Orbiting closer to the Sun, a Venus year lasts 225 Earth days. Venus passes Earth from behind on each orbital approach, and on an inside track.