UFO Sighting in San Marcos, California on June 7th 2015 – Silver/reflective sphere in blue sky stationary over my house

I was on my back patio with my sister, on a clear afternoon, blue sky without clouds. I was sitting on a patio chair and my sister was standing. She noticed something in the sky so I stood up and she pointed it out to me, clearly visible above my house was a hovering/stationary silver sphere reflecting the sunlight. We observed it for about 2 minutes and I then ran into my house to get my HD camera while my sister continued to watch the sphere. She pointed it out to me again and I shot several still photos and 2 videos, but really the camera didn't know what to focus on, and without anything other than the LCD screen (no viewfinder on camera)I couldn't zoom in on the object. It very slowly moved off to the South East, moving very slowly at constant altitude. It was not a helicopter, not an airplane, not a balloon. My sister said she saw rotating lights moving around the sphere counterclockwise but more vertical than horizontal, although I did not observe that detail.