| Invention or discovery | Inventor or discoverer | Type |
|---|---|---|
| NGC 988 | Édouard Stephan | spiral galaxy |
| NGC 228 | Édouard Stephan | spiral galaxy |
| NGC 707 | Wilhelm Tempel | low-ionization nuclear emission-line region |
| NGC 968 | Édouard Stephan | elliptical galaxy |
| NGC 1093 | Édouard Stephan | spiral galaxy |
| NGC 1226 | Édouard Stephan | galaxy |