Glowing Blue Cone, Hovering, about 1 mile away and about 2000' up (maybe not that high even)

I was working in my backyard and looked up in the sky to the east just in time to see a military/cargo plane(prop) fly by this object in the sky. Of course by the shape of it, and the fact a large plane had just flown by I assumed it to be a sky diver with parachute deployed. There was not a cloud in the sky. This object was a very vibrant baby-blue color: like the canopy was glowing silver in the sun and the skydiver was dangling and swaying back and forth from glowing blue attachments to the canopy above. The only peculiarity of this visual was that the plane and the object were not in a position that would be congruent with a sky-diver. But who am I to judge these things, from a distance?
The plane disappeared from sight, but this object didn't move. at all. But to me, from a distance it still looked like a skydiver as it appeared as thought the bottom was swaying back-and-forth. "Maybe he's just stuck in cross-wind and drifting sideways", I thought. Being curious and wanting to get a better look using modern-day consumer technology, I used my cell phone to zoom-in and take a clear picture, hoping to catch the guy dangling from a parachute. When I was able to get the camera to focus I could clearly see it was not a sky-diver dangling from a parachute. It was a glowing blue object that looked like an ice cream cone(domed).
The top dome was glowing baby-blue color. And there was light-blue glow circling a time or two per second around the cone-shaped part of the object. From a distance that was what made me thing it was a sky-diver swaying the wind. But in focus I could totally tell this thing was a solid object, and I thought I could even see the rivets in the metal holding the top dome and bottom cone-shape together. I was able to quickly take a picture that came out totally fuzzy (of course!). I steadied the camera again and tapped the screen to focus on the object at distance, and it looked absolutely perfect as described above.
As soon as I tried to take the picture of this AMAZING object.... it was gone, no where to be found. I searched in every direction as quickly as I could and there was no trace of it, or any other aircraft, or clouds in the sky. It was almost as if it knew. It KNEW I had it in my sights, and just completely disappeared in an instant, before I could prove what I had seen.
But that's ok. I know what I saw. It was unbelievable!... and I feel privileged to have seen something so completely bizarre, beautiful, and mysterious.