| Total | |
|---|---|
| Number of active observers: (total includes noncontributing observers) |
2421 of 2994 |
| Number of active associations: (total includes noncontributing associations) |
17 of 18 |
| Number of active countries: (total includes noncontributing countries) |
72 of 249 |
| Number of observed comets: (total is number of comets in COBS database) |
1564 of 2429 |
| Total number of observations: | 272756 |
| Visual Observations: | 224116 |
| CCD Observations: | 48640 |
| Comet type | Total | Visual | CCD |
|---|
| Year | Total | Visual | CCD | Obs |
|---|
| Comet | Total | Visual | CCD | Obs |
|---|
| Observer | Total | Visual | CCD | Obs |
|---|
| Association | Total | Visual | CCD | Obs |
|---|
| Country | Total | Visual | CCD | Obs | Abb |
|---|