I found this object in a parking lot of a university, I was interested in it so I picked it up and put it in my car. Later to my suprise I found it is magnetic. Here’s the best discription I can give:
Dull silver metalic sphere, apx 1 + 1/8 inch in diameter. Has 12 raised ‘bumps’ , each bump is an additional 1/8 inch above the surface, cone shaped with a blunted top.
These bumps are fairly evenly spaced, I don’t know it’s the ‘best’ way to arange them, but it’s in a pattern that tries to space the bumps out evenly over the surface of the sphere.
The magnetic polls are aligned so N and S each fall between 4 of the bumps.
The only other distinguishing marks seem to be from manufacture. A small circle is indented in the sphere where one of the poles is, the circle is about 3/16 in diameter (think of the Earth’s N pole icecap ringing a circle on the globe). There is an equator circle also, and the other pole has a 3rd circle that is maybe 1/2 and inch in diameter and goes through 4 bumps.
What is this thing?