Daily Sunspot Evaluation
Observation Sheet Wednesday, 11 December 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)
- 10
- Number of spots (f)
- 44
- Relative number (R)
- 144
- Observer
- MH
- Reading
- all checks consistent
- File
- 19571211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 14 | 24E | ||||
| 2 | C – 2 | 23 | 57E | ||||
| 3 | A – 1 | -20 | 65E | ||||
| 4 | A – 3 | -12 | 23E | ||||
| 5 | B – 2 | -28 | 22E | ||||
| 6 | A – 3 | -16 | 10W | ||||
| 7 | G – 3 | -19 | 21W | ||||
| 8 | C – 3 | 7 | 53W | ||||
| 9 | H – 7 | 10 | 12W | ||||
| 10 | C – 19 | 12 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.