Daily Sunspot Evaluation
Observation Sheet Friday, 15 August 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)
- 8
- Number of spots (f)
- 132
- Relative number (R)
- 212
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | 16 | 5E | ||||
| 2 | C – 9 | -13 | 47E | ||||
| 3 | A – 7 | -25 | 4W | ||||
| 4 | E – 39 | -24 | 44W | ||||
| 5 | F – 52 | -12 | 37W | ||||
| 6 | A – 7 | 9 | 10W | ||||
| 7 | A – 1 | 17 | 46W | ||||
| 8 | C – 8 | 45 | 14W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.