Herschel 2500 | W. & C. Herschel | 1786–1802| Varies | Every deep-sky discovery
Herschel 400-1 | Ancient City AC | 1980 | Intermediate | The "Best of" Herschel
Herschel 400-2 | Rose City Astronomers | 1997Advanced | Fainter NGC galaxies
Herschel 400-3 | Astronomical League | Recent | Expert | Completing the 1,200-list