¶ Spectral Type
On approach to Adalia the pioneers executed a system-wide scan of all major and minor bodies, including the 250,000 asteroids exceeding a radius of 1km. Spectral types were assigned based on their emission spectrum, color, and surface albedo. The four most prominent groupings were assigned types C, S, M, I with the remaining asteroids composed of portions of them. Each spectral type had a unique set of raw materials which could help produce the various products to support life in the belt.
¶ Spectral Catagories
¶ C-type
C-type (carbonaceous) asteroids are the most common spectral type, with 65% being pure C-type. Composed of carbon compounds, water, and minerals like Serpentine and Olivine, they are found throughout the belt, inner, main and outer, but have the highest concentration in the main belt, around 2 AU semi-major axis. C-type is also found in Cm, Ci, Cs, Cms, and Cis mixed-type asteroids.
¶ Pure C-type Available Resources
| Icon | Name | Classification | Category | Unit mass (kg) | Unit volume (L) | Is atomic |
|---|---|---|---|---|---|---|
 |
Apatite | Raw Material | Organic | 1 | 0.521 | No |
 |
Bitumen | Raw Material | Organic | 1 | 1.6 | No |
 |
Carbon Dioxide | Raw Material | Volatile | 1 | 0.801 | No |
 |
Carbon Monoxide | Raw Material | Volatile | 1 | 1.25 | No |
 |
Calcite | Raw Material | Organic | 1 | 0.615 | No |
 |
Methane | Raw Material | Volatile | 1 | 2.22 | No |
 |
Water | Raw Material | Volatile | 1 | 0.971 | No |
¶ S-type
S-type (stony) asteroids are the second most common spectral type, with under 10% being pure S-type. They are composed of iron and magnesium silicates like Pyroxene, Olivine, and Chromite and contain little to no water. They are found predominantly in the inner and main belts with the highest concentration around 1.6 AU semi-major axis. S-type is also found in Cs, Cms, Cis, Sm, and Si mixed-type asteroids.
¶ Pure s-type Available Resources
| Icon | Name | Classification | Category | Unit mass (kg) | Unit volume (L) | Is atomic |
|---|---|---|---|---|---|---|
 |
Coffinite | Raw Material | Fissile | 1 | 0.327 | No |
 |
Feldspar | Raw Material | Metal | 1 | 0.606 | No |
 |
Merrillite | Raw Material | Rare Earth | 1 | 0.521 | No |
 |
Olivine | Raw Material | Metal | 1 | 0.617 | No |
 |
Pyroxene | Raw Material | Metal | 1 | 0.476 | No |
 |
Xenotime | Raw Material | Rare Earth | 1 | 0.358 | No |
¶ M-type
M-type (metallic) asteroids are fairly uncommon, with less than 5% being pure M-type. They are bright asteroids that are the remaining pieces of the metallic core of early minor planets and made up primarily of nickel-iron. They are found in the main belt with the highest concentration around 1.8 AU. M-type composition is also found in Cm, Cms, and Sm mixed-type asteroids.
¶ Pure M-type Available Resources
| Icon | Name | Classification | Category | Unit mass (kg) | Unit volume (L) | Is atomic |
|---|---|---|---|---|---|---|
 |
Graphite | Raw Material | Metal | 1 | 0.737 | No |
 |
Rhabdite | Raw Material | Metal | 1 | 0.233 | No |
 |
Taenite | Raw Material | Metal | 1 | 0.208 | No |
 |
Troilite | Raw Material | Metal | 1 | 0.362 | No |
 |
Uraninite | Raw Material | Fissile | 1 | 0.156 | No |
¶ I-type
I-type (icy) asteroids are uncommon within the belt with approx. 12% of the belt being pure I types. They are very dark and composed of rock and frozen volatiles like methane, ammonia, and water. They are found solely in extreme outer belt around 3 AU, and orbit in the L4 and L5 Lagrange points of the massive Adalia C planet.
¶ Pure I-type Available Resources
| Icon | Name | Classification | Category | Unit mass (kg) | Unit volume (L) | Is atomic |
|---|---|---|---|---|---|---|
 |
Ammonia | Raw Material | Volatile | 1 | 1.37 | No |
|
Carbon Dioxide | Raw Material | Volatile | 1 | 0.801 | No |
|
Carbon Monoxide | Raw Material | Volatile | 1 | 1.25 | No |
 |
Hydrogen | Raw Material | Volatile | 1 | 14.1 | No |
|
Methane | Raw Material | Volatile | 1 | 2.22 | No |
 |
Nitrogen | Raw Material | Volatile | 1 | 1.24 | No |
 |
Sulfur Dioxide | Raw Material | Volatile | 1 | 0.684 | No |
|
Water | Raw Material | Volatile | 1 | 0.971 | No |
¶ Relevant Resources
- Raw Resources Overview of asteroid resources and spectral compositions
- Adalian Belt Distribution Breakdown of asteroids throughout the belt and their quantities