| Invention or discovery | Date | Inventor or discoverer |
|---|---|---|
| NGC 3426 | March 23, 1887 | Lewis A. Swift |
| NGC 3633 | March 23, 1887 | Lewis A. Swift |
| NGC 2817 | March 26, 1887 | Lewis A. Swift |
| NGC 4446 | April 17, 1887 | Lewis A. Swift |
| NGC 3443 | April 24, 1887 | Lewis A. Swift |
| NGC 3474 | April 24, 1887 | Lewis A. Swift |
| NGC 4544 | April 27, 1887 | Edward D. Swift |