Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 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)
- 12
- Number of spots (f)
- 140
- Relative number (R)
- 260
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 6 | 45 | 8E | ||||
| 2 | A – 2 | 27 | 61E | ||||
| 3 | C – 6 | 16 | 29E | ||||
| 4 | A – 1 | 17 | 40E | ||||
| 5 | A – 1 | 3 | 37E | ||||
| 6 | E – 48 | -23 | 20W | ||||
| 7 | F – 49 | -13 | 10W | ||||
| 8 | A – 1 | -5 | 35W | ||||
| 9 | ? – 3 | -21 | 77W | ||||
| 10 | C – 11 | -11 | 55W | ||||
| 11 | ? – 10 | 20 | 77W | ||||
| 12 | A – 2 | 17 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.