Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 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)
- 11
- Number of spots (f)
- 52
- Relative number (R)
- 162
- Observer
- KA
- Reading
- all checks consistent
- File
- 19551221.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.54 | 20 | |
| 2 | B – 4 | 0.68 | 63 | |
| 3 | A – 2 | 0.75 | 69 | |
| 4 | B – 4 | 0.74 | 70 | |
| 5 | E – 16 | 0.58 | 125 | |
| 6 | J – 1 | 0.58 | 135 | |
| 7 | H – 7 | 0.64 | 224 | |
| 8 | A – 1 | 0.64 | 250 | |
| 9 | B – 2 | 0.86 | 254 | |
| 10 | E – 10 | 0.94 | 302 | |
| 11 | J – 4 | 0.85 | 309 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.