Daily Sunspot Evaluation
Observation Sheet Friday, 25 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)
- 11
- Number of spots (f)
- 57
- Relative number (R)
- 167
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 7 | 3E | ||||
| 2 | D – 19 | 11 | 13E | ||||
| 3 | A – 3 | 9 | 17E | ||||
| 4 | H – 6 | 17 | 28E | ||||
| 5 | ? – 1 | 29 | 78E | ||||
| 6 | H – 1 | -16 | 56E | ||||
| 7 | A – 5 | -5 | 7W | ||||
| 8 | A – 1 | -10 | 35W | ||||
| 9 | H – 14 | -23 | 55W | ||||
| 10 | J – 3 | 12 | 26W | ||||
| 11 | A – 1 | 25 | 52W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.