Daily Sunspot Evaluation
Observation Sheet Wednesday, 4 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)
- 82
- Relative number (R)
- 152
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570904.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 12 | 81E | ||||
| 2 | C – 4 | -10 | 44E | ||||
| 3 | B – 4 | -25 | 33E | ||||
| 4 | H – 4 | -30 | 49W | ||||
| 5 | D – 7 | -17 | 62W | ||||
| 6 | F – 34 | 16 | 52W | ||||
| 7 | F – 27 | 25 | 49W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.