Despite the fact that many clouds were floating over my western horizon this evening, I could get some photos of Mercury and Mars only 14 arcminutes apart over Rio de Janeiro at dusk (from 17:45 to 18:30 UTC-3h, June 18, 2019).

Forming a beautiful close pair through binoculars, Mercury was an easy naked-eye target while Mars (4.4 times dimmer) required the use of averted vision to be briefly spotted.

Hope my images can help give you an idea of what the interesting event looked like.