Daily Sunspot Evaluation
Observation Sheet Friday, 11 April 1958
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)
- 108
- Relative number (R)
- 248
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | 14 | 36E | ||||
| 2 | J – 1 | -4 | 58E | ||||
| 3 | B – 9 | -14 | 20E | ||||
| 4 | C – 8 | -22 | 18E | ||||
| 5 | B – 7 | -12 | 12W | ||||
| 6 | B – 7 | -15 | 28W | ||||
| 7 | A – 1 | 10 | 68W | ||||
| 8 | ? – 1 | 21 | 73W | ||||
| 9 | E – 28 | 16 | 44W | ||||
| 10 | C – 9 | 11 | 40W | ||||
| 11 | F – 25 | 13 | 21W | ||||
| 12 | A – 3 | 15 | 12W | ||||
| 13 | A – 4 | 30 | 52W | ||||
| 14 | A – 1 | 42 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.