Daily Sunspot Evaluation
Observation Sheet Sunday, 21 October 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)
- 13
- Number of spots (f)
- 95
- Relative number (R)
- 225
- Observer
- TA
- Reading
- all checks consistent
- File
- 20011021.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 11 | 81W | 26 | 84W | - | |
| 2 | EAO – 8 | 15 | 53W | 358 | 56W | 11 | |
| 3 | HA – 2 | 26 | 12W | 314 | 15W | 1 | |
| 4 | DRI – 9 | 15 | 12W | 317 | 15W | ~8 | |
| 5 | EAC – 20 | 14 | 01W | 306 | 04W | 10.5 | |
| 6 | HA – 5 | 4 | 42E | 263 | 39E | 3.5 | |
| 7 | CAO – 2 | 15 | 68E | 237 | 65E | ~4 | |
| 8 | BAO – 2 | 21 | 70E | 235 | 67E | 4 | |
| 9 | HA – 1 | -15 | 73W | 18 | 76W | 2 | |
| 10 | FAO – 18 | -17 | 16E | 289 | 13E | ~18 | |
| 11 | CAO – 9 | -8 | 17E | 288 | 14E | 6 | |
| 12 | HK – 17 | -18 | 36E | 269 | 33E | 8 | |
| 13 | HA – 1 | -13 | 65E | 240 | 62E | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.