Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 122
- Relative number (R)
- 272
- Observer
- FY
- Reading
- all checks consistent
- File
- 19571013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 7 | 13 | 1E | ||||
| 2 | B – 3 | 24 | 22E | ||||
| 3 | A – 2 | 41 | 50E | ||||
| 4 | D – 7 | 24 | 43E | ||||
| 5 | A – 1 | 27 | 62E | ||||
| 6 | C – 9 | 11 | 41E | ||||
| 7 | A – 1 | 9 | 66E | ||||
| 8 | C – 5 | 6 | 32E | ||||
| 9 | F – 24 | -25 | 55E | ||||
| 10 | E – 32 | -17 | 26E | ||||
| 11 | D – 3 | -15 | 59W | ||||
| 12 | D – 5 | 13 | 96W | ||||
| 13 | E – 14 | 20 | 28W | ||||
| 14 | ? – 1 | 42 | 80W | ||||
| 15 | C – 8 | 26 | 13W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.