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Table 1.
Number (No.) of SSOs with Gaia DR3 spectra for each of the dynamical classes listed on the NASA JPL website.
| Dynamical class | No. of SSO | Criterion (values in au) |
|---|---|---|
| NEA aten | 6 | a < 1.0 & Q > 0.983 |
| NEA apollo | 52 | a > 1.0 & q < 1.017 |
| NEA amor | 47 | 1.017 < q < 1.3 |
| Mars-crosser | 729 | 1.3 < q < 1.666 |
| Inner main belt | 1221 | a < 2.0 & q > 1.666 |
| Main belt | 55 976 | 2.0 < a < 3.2 & q > 1.666 |
| Outer main belt | 1995 | 3.2 < a < 4.6 |
| Jupiter trojan | 477 | 4.6 < a < 5.5 |
| Centaur | 5 | 5.5 < a < 30.1 |
| TNO | 7 | a > 30.1 |
| Other | 2 | None of the above |
Notes. The classes are defined according to criteria based on the orbital semimajor axis, a, the perihelion distance, q, and the aphelion distance, Q.
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