Daily Sunspot Evaluation
Observation Sheet Friday, 10 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)
- 12
- Number of spots (f)
- 96
- Relative number (R)
- 216
- Observer
- AK
- Reading
- all checks consistent
- File
- 19590410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 18 | 13 | 4E | ||||
| 2 | C – 4 | 22 | 9E | ||||
| 3 | C – 12 | 25 | 59E | ||||
| 4 | C – 13 | 9 | 46E | ||||
| 5 | D – 5 | 1 | 33E | ||||
| 6 | D – 12 | -16 | 50E | ||||
| 7 | A – 2 | -24 | 69E | ||||
| 8 | E – 15 | -22 | 6W | ||||
| 9 | B – 2 | -20 | 40W | ||||
| 10 | ? – 7 | 16 | 75W | ||||
| 11 | C – 5 | 12 | 54W | ||||
| 12 | A – 1 | 17 | 59W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.