Daily Sunspot Evaluation
Observation Sheet Saturday, 4 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)
- 7
- Number of spots (f)
- 73
- Relative number (R)
- 143
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 12 | 13 | 27E | ||||
| 2 | A – 1 | 10 | 32E | ||||
| 3 | A – 1 | -10 | 5W | ||||
| 4 | H – 1 | 9 | 77W | ||||
| 5 | E – 34 | 15 | 46W | ||||
| 6 | F – 21 | 25 | 54W | ||||
| 7 | B – 3 | 14 | 2W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.