Daily Sunspot Evaluation
Observation Sheet Saturday, 12 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)
- 10
- Number of spots (f)
- 129
- Relative number (R)
- 229
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 33E | ||||
| 2 | H – 5 | 6 | 57E | ||||
| 3 | B – 6 | -3 | 38E | ||||
| 4 | D – 18 | -16 | 34E | ||||
| 5 | C – 11 | -16 | 14W | ||||
| 6 | A – 2 | -15 | 20W | ||||
| 7 | D – 12 | -17 | 32W | ||||
| 8 | F – 55 | 6 | 12W | ||||
| 9 | C – 16 | 12 | 7W | ||||
| 10 | B – 3 | 12 | 27W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.