Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 October 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)
- 15
- Number of spots (f)
- 117
- Relative number (R)
- 267
- Observer
- AK
- Reading
- all checks consistent
- File
- 19571009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 25 | 20 | 22E | ||||
| 2 | D – 11 | 25 | 37E | ||||
| 3 | J – 3 | 8 | 46E | ||||
| 4 | A – 1 | -20 | 23E | ||||
| 5 | B – 10 | -41 | 12W | ||||
| 6 | C – 5 | -17 | 7W | ||||
| 7 | A – 2 | -27 | 53W | ||||
| 8 | A – 1 | -12 | 31W | ||||
| 9 | G – 3 | -23 | 67W | ||||
| 10 | B – 5 | -16 | 46W | ||||
| 11 | A – 1 | -6 | 49W | ||||
| 12 | E – 29 | 15 | 24W | ||||
| 13 | ? – 4 | 35 | 85W | ||||
| 14 | D – 10 | 40 | 38W | ||||
| 15 | B – 7 | 14 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.