Daily Sunspot Evaluation
Observation Sheet Sunday, 20 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)
- 14
- Number of spots (f)
- 136
- Relative number (R)
- 276
- Observer
- WG
- Reading
- all checks consistent
- File
- 19571020.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 24 | 22E | ||||
| 2 | A – 2 | 15 | 26E | ||||
| 3 | D – 6 | 24 | 44E | ||||
| 4 | C – 9 | 22 | 71E | ||||
| 5 | A – 4 | 17 | 63E | ||||
| 6 | A – 2 | 14 | 74E | ||||
| 7 | ? – 6 | -22 | 73E | ||||
| 8 | A – 4 | -12 | 22E | ||||
| 9 | A – 4 | -26 | 7E | ||||
| 10 | A – 1 | -16 | 1W | ||||
| 11 | F – 77 | -25 | 30W | ||||
| 12 | D – 7 | -17 | 68W | ||||
| 13 | D – 6 | 23 | 76W | ||||
| 14 | C – 7 | 24 | 35W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.