Asteroid Distribution

The spectral types are distributed throughout the main belt in varying compositions. The results of the survey have been plotted:

Entire Belt Distribution

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 System
C-type	65.00%
Ci-type	2.50%
Cis-type	1.25%
Cm-type	1.25%
Cms-type	2.50%
Cs-type	5.00%
I-type	1.25%
M-type	5.00%
S-type	10.00%
Si-type	1.25%
Sm-type	5.00%

Outer Belt Distribution

Spectral Type	Total #	% of System
C-type	27.50%
Ci-type	15.00%
I-type	57.50%