Daily Sunspot Evaluation
Observation Sheet Saturday, 11 April 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)
- 14
- Number of spots (f)
- 132
- Relative number (R)
- 272
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 23 | 26 | 47E | ||||
| 2 | ? – 1 | 18 | 78E | ||||
| 3 | E – 20 | 9 | 33E | ||||
| 4 | D – 8 | 1 | 20E | ||||
| 5 | B – 3 | -11 | 56E | ||||
| 6 | D – 17 | -16 | 36E | ||||
| 7 | A – 1 | -23 | 55E | ||||
| 8 | A – 1 | -15 | 21E | ||||
| 9 | E – 25 | -22 | 20W | ||||
| 10 | ? – 1 | 17 | 80W | ||||
| 11 | T – 1 | 14 | 61W | ||||
| 12 | A – 2 | 25 | 25W | ||||
| 13 | E – 22 | 13 | 10W | ||||
| 14 | C – 7 | 22 | 4W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.