Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 December 1955
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)
- 6
- Number of spots (f)
- 27
- Relative number (R)
- 87
- Observer
- KA
- Reading
- all checks consistent
- File
- 19551213.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.9 | 62 | |
| 2 | E – 5 | 0.85 | 69 | |
| 3 | A – 1 | 0.69 | 69 | |
| 4 | ? – 2 | 0.96 | 133 | |
| 5 | A – 1 | 0.68 | 247 | |
| 6 | H – 16 | 0.74 | 322 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.