Daily Sunspot Evaluation
Observation Sheet Tuesday, 24 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)
- 18
- Number of spots (f)
- 167
- Relative number (R)
- 347
- Observer
- WG
- Reading
- all checks consistent
- File
- 19571224.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 54 | 25 | 11E | ||||
| 2 | H – 2 | 14 | 41E | ||||
| 3 | A – 1 | 9 | 72E | ||||
| 4 | J – 2 | -4 | 51E | ||||
| 5 | ? – 1 | -9 | 85E | ||||
| 6 | E – 15 | -19 | 32E | ||||
| 7 | A – 2 | -22 | 45E | ||||
| 8 | B – 4 | -18 | 16E | ||||
| 9 | B – 3 | -16 | 10E | ||||
| 10 | F – 37 | -24 | 5W | ||||
| 11 | J – 1 | -14 | 8W | ||||
| 12 | A – 2 | -15 | 27W | ||||
| 13 | D – 6 | -16 | 67W | ||||
| 14 | J – 3 | -4 | 51W | ||||
| 15 | E – 11 | 17 | 56W | ||||
| 16 | J – 1 | 23 | 43W | ||||
| 17 | E – 20 | 15 | 19W | ||||
| 18 | A – 2 | 27 | 15W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.