Daily Sunspot Evaluation
Observation Sheet Friday, 7 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)
- 10
- Number of spots (f)
- 127
- Relative number (R)
- 227
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20010907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 22 | 82W | 247 | 84W | ~3 | |
| 2 | EKC – 18 | 14 | 56W | 221 | 58W | 12 | |
| 3 | HA – 4 | 11 | 14W | 179 | 16W | 2.5 | |
| 4 | CSO – 4 | 22 | 49E | 116 | 47E | 4 | |
| 5 | CAO – 6 | -5 | 59W | 224 | 61W | ~6 | |
| 6 | CAO – 3 | -9 | 05E | 160 | 03E | 1 | |
| 7 | EAC – 32 | -18 | 13E | 152 | 11E | 15 | |
| 8 | FAC – 20 | -12 | 38E | 127 | 36E | ~16 | |
| 9 | FKC – 30 | -27 | 56E | 109 | 54E | ~27 | |
| 10 | ? – 9 | -13 | 69E | 96 | 67E | ~11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.