Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 7
- Number of spots (f)
- 82
- Relative number (R)
- 152
- Observer
- ET
- Reading
- all checks consistent
- File
- 19590913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 6 | 5 | 44E | ||||
| 2 | A – 3 | -3 | 24E | ||||
| 3 | B – 8 | -17 | 22E | ||||
| 4 | G – 6 | -17 | 27W | ||||
| 5 | D – 17 | -18 | 46W | ||||
| 6 | F – 33 | 7 | 27W | ||||
| 7 | A – 9 | 12 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.