Daily Sunspot Evaluation
Observation Sheet Sunday, 23 September 2001
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 14
- Number of spots (f)
- 188
- Relative number (R)
- 328
- Observer
- TÇ
- Reading
- all checks consistent
- File
- 20010923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 7 | 8 | 48W | 326 | 51W | 7 | |
| 2 | EKC – 36 | 12 | 36W | 314 | 39W | ~11.5 | |
| 3 | DHO – 18 | 12 | 11W | 289 | 14W | 9.5 | |
| 4 | DRI – 12 | 25 | 05W | 283 | 08W | ~7 | |
| 5 | HS – 2 | 1 | 03W | 281 | 06W | ~2 | |
| 6 | CRI – 6 | 20 | 24E | 254 | 21E | 4 | |
| 7 | HS – 1 | 21 | 74E | 204 | 71E | ~2 | |
| 8 | HR – 2 | 11 | 78E | 200 | 75E | 4 | |
| 9 | ? – 1 | 12 | 87E | 191 | 84E | ? | |
| 10 | ? – 1 | -12 | 82W | 360 | 85W | ? | |
| 11 | DRI – 6 | -11 | 65W | 343 | 68W | ~10 | |
| 12 | HR – 7 | -1 | 13E | 265 | 10E | 2 | |
| 13 | FKC – 59 | -19 | 23E | 255 | 20E | 19.5 | |
| 14 | HK – 30 | -19 | 43E | 235 | 40E | ~8.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.