Daily Sunspot Evaluation
Observation Sheet Sunday, 25 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)
- 11
- Number of spots (f)
- 47
- Relative number (R)
- 157
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570825.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 14 | 85E | ||||
| 2 | ? – 1 | 4 | 85E | ||||
| 3 | C – 9 | 2 | 50E | ||||
| 4 | C – 7 | -20 | 33E | ||||
| 5 | ? – 4 | -38 | 72E | ||||
| 6 | A – 1 | -31 | 25E | ||||
| 7 | H – 1 | -29 | 18E | ||||
| 8 | J – 3 | -14 | 0 | ||||
| 9 | H – 3 | 23 | 48W | ||||
| 10 | C – 16 | 25 | 35W | ||||
| 11 | A – 1 | 28 | 28W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.