Hey-ho–

I am trying to understand some apparently minor points about CIELAB.

Like:

What do the asterisks in CIEL*a*b* stand for? Do they represent a math function? (Not my best subject, although with explanations I can do.)

On the X-rite CIELAB color chart what is the significance of the 60, 60, -60, -60 clockwise around the circumference of the chart? I realize the grid in the chart is in increments of 2 from 0 out to 60 or -60 but what do the numbers signify? If it is just the chroma, how does the range 0 to 60 relate?

What value is considered the 0 point in the hue? It seems to be a red. Or does this even matter?

What is the best visual 3D diagram of the CIELAB sphere and where can I find it?

If I am allowed I would gladly post an image of the CIELAB chart I am talking about.

Thank-you for your indulgence and time.