The spectral types are distributed throughout the main belt in varying compositions. The results of the survey have been plotted:
| Spectral Type |
Total # |
% of System |
| C-type |
144,244 |
57.70% |
| Ci-type |
12,341 |
4.93% |
| Cis-type |
2,564 |
1.02% |
| Cm-type |
2,415 |
0.97% |
| Cms-type |
4,944 |
1.98% |
| Cs-type |
9,888 |
3.95% |
| I-type |
30,918 |
12.36% |
| M-type |
10,066 |
4.02% |
| S-type |
20,091 |
8.06% |
| Si-type |
2,480 |
0.99% |
| Sm-type |
10,049 |
4.02% |
¶ Main Belt Distribution
| Spectral Type |
Total # |
% of main belt |
| C-type |
81,137 |
65.00% |
| Ci-type |
3,118 |
2.50% |
| Cis-type |
1,561 |
1.25% |
| Cm-type |
1,561 |
1.25% |
| Cms-type |
3,118 |
2.50% |
| Cs-type |
6,236 |
5.00% |
| I-type |
1,561 |
1.25% |
| M-type |
6,236 |
5.00% |
| S-type |
12,471 |
10.00% |
| Si-type |
1,561 |
1.25% |
| Sm-type |
6,236 |
5.00% |
| Spectral Type |
Total # |
% of outer belt |
| C-type |
27,567 |
27.50% |
| Ci-type |
15,000 |
15.00% |
| I-type |
57,500 |
57.50% |