Daily Sunspot Evaluation
Observation Sheet Monday, 12 August 1957
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)
- 36
- Relative number (R)
- 116
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 15 | 17 | 10E | ||||
| 2 | J – 3 | 22 | 70E | ||||
| 3 | H – 4 | 13 | 22E | ||||
| 4 | C – 7 | -9 | 36E | ||||
| 5 | E – 1 | -32 | 76E | ||||
| 6 | A – 1 | -18 | 23E | ||||
| 7 | B – 3 | -18 | 32W | ||||
| 8 | J – 2 | 9 | 76W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.