Caught it with my camera flying about 100 ft above ground level at mach 1+ yet no visible engine, no sonic boom, no contrail, no sound!

I was out for a Sunday drive snapping photos of the snow on the peaks east of Santa Maria.  The snow level had recently dropped down to about 1000 ft--a rare event here. Hoping to snap better pictures, I drove about 12 miles southeast of Santa Maria to the little village of Sisquoc which offers more dramatic views of the mountains. I was looking for snowy picturesque peaks, not UFOs.
At approximately 11:40 AM (give or take 15 minutes), I had just driven east of Sisquoc and started snapping more pix. Sisquoc is at about 460 ft elevation. My guesstimate is that this craft was flying about 100 ft above the ground at an elevation of 560 ft above sea level. I guesstimate the vessel to be travelling 800-1200 MPH.
The craft had no visible engine or intake humps, no sound, no contrails, no visible lights, no markings & no tail. The craft was far too large & fast to be a drone. Also, the nose of the craft was too blunted, the "wings" too "vee'd" & the craft was too tailess to be a Stealth or an F117. I did check out "secret" prototype aircraft online to see if there was anything like it but they all had long needle noses or were otherwise too different so no match.
THE MOST ASTOUNDING THING ABOUT THIS CRAFT WAS THE SPHERE SUSPENDED BETWEEN THE END OF THE TWO "WINGS" AT THE BACK OF THE VESSEL. THE SPHERE HAD NO VISIBLE MEANS OF SUPPORT!
I guesstimate the craft to be about 50 ft in length & the sphere at the back to be about 6-10 feet in diameter. These are just my extremely unprofessional estimates.
The craft was about 5 miles east of my position & appeared to be flying northbound. I would estimate the craft to be 5 1/8 mile east of Sisquoc flying quite low for the speed it was travelling.