Daily Sunspot Evaluation
Observation Sheet Sunday, 1 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)
- 7
- Number of spots (f)
- 151
- Relative number (R)
- 221
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570901.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 13 | -29 | 16 | |
| 2 | B – 13 | -18 | 20 | |
| 3 | ? – 10 | -25 | 66 | |
| 4 | J – 4 | -12 | 62 | |
| 5 | C – 24 | 12 | 45 | |
| 6 | F – 50 | 15 | 11 | |
| 7 | F – 37 | 25 | 9 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.