Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 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)
- 15
- Number of spots (f)
- 191
- Relative number (R)
- 341
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 45 | 26E | ||||
| 2 | J – 4 | 45 | 43E | ||||
| 3 | A – 5 | 46 | 53E | ||||
| 4 | A – 2 | 3 | 68E | ||||
| 5 | A – 2 | 5 | 4E | ||||
| 6 | F – 51 | -13 | 4E | ||||
| 7 | B – 17 | -27 | 1E | ||||
| 8 | E – 52 | -24 | 3W | ||||
| 9 | B – 6 | -7 | 13W | ||||
| 10 | C – 14 | -12 | 67W | ||||
| 11 | C – 10 | -12 | 39W | ||||
| 12 | A – 2 | -13 | 71W | ||||
| 13 | C – 15 | 20 | 54W | ||||
| 14 | A – 1 | 39 | 79W | ||||
| 15 | A – 2 | 11 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.