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Table 1
Classes of objects among Gaia simulations used for testing OA algorithms.
| Class | Description |
|
|
|
| AFGKM | Main sequence stars, from PHOENIX model |
| OB | Very hot OB stars |
| WD | White dwarfs, both DA and DB |
| UCD | Ultra cool dwarfs stars |
| GALAXY | Semi-empirical galaxies |
| QSO | Semi-empirical quasars |
| PN | Semi-empirical planetary nebulae |
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