Daily Sunspot Evaluation
Observation Sheet Friday, 21 December 1956
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)
- 8
- Number of spots (f)
- 44
- Relative number (R)
- 124
- Observer
- ET
- Reading
- all checks consistent
- File
- 19561221.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 12 | 30 | |
| 2 | ? – 1 | 21 | 80 | |
| 3 | G – 8 | 16 | 66 | |
| 4 | E – 9 | -16 | 53 | |
| 5 | A – 2 | -24 | 22 | |
| 6 | A – 1 | -45 | 26 | |
| 7 | H – 3 | -25 | 1 | |
| 8 | E – 19 | 13 | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.