Slowly pulsing red light moving slowly in a south east direction over Modesto, Ca.I was driving home from work, south on highway 99 from Ripon, Ca. In the south east direction (30 Deg above the horizon) I noticed a red light, pulsing very slowly. At first I thought it was a tower, but then I realized it was slowly moving.There were no other lights on the object other than the pulsing red. It seemed to be moving further south. I continued to watch it for about 2 minutes, then it was gone. It didn't just fade out, one moment it was there, then it was gone.I'm a former Navy Aviation Technician and a fan of aviation in general. I know what to look for when describing planes, helos, and jets. This object looked so foreign and out of place to me. I called my 13 year old son to look in that direction and he found it. He stated, in a very excited voice that it was "buzzing around". I, however, did not witness this. After a few minutes, he lost sight of it as well.