| Total | |
|---|---|
| Number of active observers: (total includes noncontributing observers) |
115 of 3160 |
| Number of active associations: (total includes noncontributing associations) |
16 of 18 |
| Number of active countries: (total includes noncontributing countries) |
35 of 249 |
| Number of observed comets: (total is number of comets in COBS database) |
231 of 2605 |
| Total number of observations: | 7222 |
| Visual Observations: | 2710 |
| CCD Observations: | 4512 |
| Comet type | Total | Visual | CCD |
|---|
| 2021 | Total | Visual | CCD | Obs |
|---|
| Comet | Total | Visual | CCD | Obs |
|---|
| Observer | Total | Visual | CCD | Obs |
|---|
| Association | Total | Visual | CCD | Obs |
|---|
| Country | Total | Visual | CCD | Obs |
|---|