Daily Sunspot Evaluation
Observation Sheet Friday, 11 September 1959
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)
- 135
- Relative number (R)
- 265
- Observer
- ET
- Reading
- all checks consistent
- File
- 19590911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 21 | 14 | 6E | ||||
| 2 | D – 3 | 20 | 49E | ||||
| 3 | A – 1 | 10 | 67E | ||||
| 4 | J – 3 | 5 | 70E | ||||
| 5 | F – 68 | 6 | 1E | ||||
| 6 | D – 10 | -17 | 47E | ||||
| 7 | ? – 2 | -20 | 73E | ||||
| 8 | H – 7 | -17 | 0 | ||||
| 9 | B – 6 | -18 | 18W | ||||
| 10 | B – 2 | 11 | 15W | ||||
| 11 | B – 7 | 14 | 14W | ||||
| 12 | B – 4 | 14 | 39W | ||||
| 13 | A – 1 | 21 | 61W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.