I'll say it again, I don't think the | - - - - | at the bottom are numbers at all. The spacing is too different to the 'numbers' at the top. I say it's an indication that a planet - i.e. Merope 5 c - is the unit of measurement being used.
I agree.
It looks like the left half is numbered 2 and represents gravity factor.
The right half is numbered 3 and represents size (radius and circumferense) factor.
This matches the order in the message and makes the symbols understandable.
1 is temp factor, it seems. I can not see that one in the drawing.
4 contains three numbers that Are yet to be decoded.