| Invention or discovery | Date | Inventor or discoverer |
|---|---|---|
| NGC 1214 | October 21, 1886 | Lewis A. Swift |
| NGC 240 | October 22, 1886 | Lewis A. Swift |
| NGC 332 | October 22, 1886 | Lewis A. Swift |
| NGC 398 | October 28, 1886 | Guillaume Bigourdan |
| NGC 1108 | October 31, 1886 | Lewis A. Swift |
| NGC 1118 | November 1886 | Lewis A. Swift |
| NGC 1666 | November 1886 | Lewis A. Swift |
| NGC 481 | November 20, 1886 | Lewis A. Swift |
| NGC 530 | November 20, 1886 | Lewis A. Swift |
| NGC 557 | November 20, 1886 | Lewis A. Swift |
| NGC 2676 | November 24, 1886 | Lewis A. Swift |
| NGC 1604 | December 22, 1886 | Lewis A. Swift |
| NGC 1204 | December 26, 1886 | Francis Preserved Leavenworth |
| NGC 1799 | February 13, 1887 | Lewis A. Swift |
| NGC 4447 | April 17, 1887 | Lewis A. Swift |
| NGC 4640 | April 17, 1887 | Lewis A. Swift |
| NGC 4641 | April 17, 1887 | Lewis A. Swift |