Daily Sunspot Evaluation
Observation Sheet Thursday, 26 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)
- 20
- Number of spots (f)
- 150
- Relative number (R)
- 350
- Observer
- WG
- Reading
- all checks consistent
- File
- 19571226.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 6 | 5 | 4E | ||||
| 2 | H – 4 | 14 | 15E | ||||
| 3 | G – 4 | 19 | 70E | ||||
| 4 | A – 2 | 9 | 43E | ||||
| 5 | C – 6 | -3 | 23E | ||||
| 6 | C – 5 | -9 | 59E | ||||
| 7 | A – 1 | -18 | 55E | ||||
| 8 | A – 3 | -25 | 59E | ||||
| 9 | C – 7 | -20 | 17E | ||||
| 10 | E – 18 | -18 | 5E | ||||
| 11 | C – 8 | -17 | 14W | ||||
| 12 | F – 26 | -25 | 32W | ||||
| 13 | A – 1 | -15 | 35W | ||||
| 14 | A – 1 | -15 | 53W | ||||
| 15 | ? – 3 | -5 | 80W | ||||
| 16 | ? – 2 | 17 | 79W | ||||
| 17 | ? – 1 | 23 | 71W | ||||
| 18 | D – 11 | 15 | 51W | ||||
| 19 | A – 2 | 30 | 36W | ||||
| 20 | F – 39 | 25 | 15W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.