Neon-orange orb light, slowly floating across the sky, until disappearing.

I was walking outside of my apartment complex located on River Road, along the Mississippi River in Baton Rouge.  
My friend and me automatically noticed a bright, neon orange light in the sky.  We knew it was not a plane or satellite.  
We continued to watch for about 2 minutes as it slowly floated across the sky, eventually getting smaller and smaller until it just disappeared.  
There was no sound or trail, just the glowing orb.