Opposition of Uranus or Neptune
These occur approximately every year, but they’re not always observable due to their distance and orbital positions which makes it incredibly rare to witness one. When planets are in opposition, they’re at their largest and brightest in the night sky.
Astronomy photographer Steve Marsh said, “If you want to get the best photo of a planet you want to try and aim for when it’s riding high in the sky and ‘at opposition. You want the air to be nice and still. If you can get all those three things combined then you are going to have a great picture at the end of it.” Make sure you capture a photo of this rare event (RMG).