Large stationary object in sky over El Cajon CA

Walking my dog in the field near my home, at approx 7:10pm, I stopped to admire the full moon in the evening sky, it looked huge. Just then I noticed something glint, which drew my attention to what looked like a large very dark and solid object at about the 4pm position from the moon. It remained completely immobile and stationary for at least five minutes. It took a few minutes to get my phone out & take a photo. I turned my attention to my dog for a moment, when I looked back up the object was gone.
I'm submitting the one photo I took, I've made a collage-- 1- the original photo 2- the object circled in red 3- a blow-up of the object, and 4-- the object enhanced using the sharpen and contrast functions of my software.