| Invention or discovery | Inventor or discoverer | Type |
|---|---|---|
| NGC 739 | Ralph Copeland | lenticular galaxy |
| NGC 2350 | Édouard Stephan | lenticular galaxy |
| NGC 2449 | Édouard Stephan | spiral galaxy |
| NGC 2454 | Édouard Stephan | spiral galaxy |
| NGC 2418 | Édouard Stephan | elliptical galaxy |
| NGC 3975 | Lawrence Parsons, 4th Earl of Rosse | spiral galaxy |
| NGC 2875 | Lawrence Parsons, 4th Earl of Rosse | asterism |
| NGC 2429 | Ralph Copeland | spiral galaxy |
| NGC 3013 | Lawrence Parsons, 4th Earl of Rosse | spiral galaxy |
| NGC 3743 | Ralph Copeland | lenticular galaxy |
| NGC 3758 | Ralph Copeland | astrophysical X-ray source |
| NGC 2457 | Ralph Copeland | spiral galaxy |
| NGC 399 | Lawrence Parsons, 4th Earl of Rosse | lenticular galaxy |
| NGC 1177 | Lawrence Parsons, 4th Earl of Rosse | lenticular galaxy |
| NGC 375 | Lawrence Parsons, 4th Earl of Rosse | elliptical galaxy |