Object Types
| Code | Object Type |
|---|---|
| BN | Bright nebula |
| DN | Dark nebula |
| Gb | Globular cluster |
| OC | Open cluster |
| OCn | Open cluster with nebulosity |
| S0 | Lenticular galaxy |
| Sab | Spiral galaxy, type a-b |
| Sb | Spiral galaxy, type b |
| Sc | Spiral galaxy, type c |
| SB | Barred spiral galaxy |
| SBc | Barred spiral galaxy, type c |
| SBp | Barred spiral galaxy, peculiar |
| mw | Milky Way area or star cloud |