| Total | |
|---|---|
| Number of active observers: (total includes noncontributing observers) |
140 of 3133 |
| Number of active associations: (total includes noncontributing associations) |
15 of 18 |
| Number of active countries: (total includes noncontributing countries) |
29 of 249 |
| Number of observed comets: (total is number of comets in COBS database) |
122 of 2588 |
| Total number of observations: | 5521 |
| Visual Observations: | 3970 |
| CCD Observations: | 1551 |
| Comet type | Total | Visual | CCD |
|---|
| 2013 | Total | Visual | CCD | Obs |
|---|
| Comet | Total | Visual | CCD | Obs |
|---|
| Observer | Total | Visual | CCD | Obs |
|---|
| Association | Total | Visual | CCD | Obs |
|---|
| Country | Total | Visual | CCD | Obs |
|---|