That's exactly it Kevin. My guess is that it is a part of the earth's accretion disk that was drawn into earth by it's growing gravitational force.
That would explain is relatively close age to earth's age. Just my theory but it makes sense to me. @astrophoto.kevin :)
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That’s a really good theory and could be certainly true. For me it makes also sense. I all cases it is something from the very beginning of our solar system. 😊