Daily Sunspot Evaluation
Observation Sheet Monday, 23 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)
- 19
- Number of spots (f)
- 171
- Relative number (R)
- 361
- Observer
- FY
- Reading
- all checks consistent
- File
- 19571223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 15 | 6E | ||||
| 2 | E – 18 | 23 | 15E | ||||
| 3 | E – 16 | 28 | 33E | ||||
| 4 | H – 1 | 15 | 54E | ||||
| 5 | J – 2 | -3 | 65E | ||||
| 6 | A – 2 | -11 | 26E | ||||
| 7 | B – 2 | -22 | 57E | ||||
| 8 | H – 15 | -19 | 46E | ||||
| 9 | B – 10 | -17 | 27E | ||||
| 10 | A – 1 | -14 | 5E | ||||
| 11 | F – 26 | -26 | 9E | ||||
| 12 | A – 2 | -15 | 12W | ||||
| 13 | B – 3 | -10 | 22W | ||||
| 14 | D – 10 | -15 | 54W | ||||
| 15 | E – 22 | 18 | 43W | ||||
| 16 | J – 1 | 24 | 30W | ||||
| 17 | A – 2 | 25 | 14W | ||||
| 18 | E – 33 | 15 | 5W | ||||
| 19 | B – 4 | 28 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.