Thanks guys, I appreciate your comments. As usual, further investigation has revealed an interloper, Ceres, which according to Wiki, was formally known as 1 Ceres.
Ceres is the only dwarf planet in the inner Solar System, and the largest asteroid. It is a rock–ice body some 950 km (590 mi) in diameter, and though the smallest identified dwarf planet, it constitutes a third of the mass of the asteroid belt.
I have updated the original images to identify this tiny body.
Cheers
Dennis
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