Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 September 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)
- 14
- Number of spots (f)
- 118
- Relative number (R)
- 258
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570925.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 5 | 25 | 34 | |
| 2 | C – 4 | 21 | 27 | |
| 3 | E – 43 | 14 | 26 | |
| 4 | ? – 10 | 15 | 74 | |
| 5 | D – 9 | 11 | 48 | |
| 6 | C – 8 | -26 | 46 | |
| 7 | A – 3 | -19 | 5 | |
| 8 | B – 2 | -13 | 10 | |
| 9 | A – 1 | -9 | 20 | |
| 10 | ? – 1 | -23 | 72 | |
| 11 | ? – 1 | -18 | 74 | |
| 12 | D – 15 | 11 | 53 | |
| 13 | H – 7 | 9 | 73 | |
| 14 | E – 9 | 24 | 76 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.