cluster     1   number of spheres in cluster     4
    1  15.37000  -5.11700  58.47300   0.700    1                                
    2  14.18200  -5.32700  59.00900   0.700    2                                
    3  15.73700  -5.72300  57.38200   0.700    3                                
    4  16.21500  -4.27500  58.99100   0.700    4