Daily Sunspot Evaluation
Observation Sheet Monday, 20 February 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)
- 7
- Number of spots (f)
- 188
- Relative number (R)
- 258
- Observer
- AK
- Reading
- all checks consistent
- File
- 19560220.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 4 | 0.93 | 42 | |
| 2 | A – 2 | 0.85 | 91 | |
| 3 | G – 9 | 0.27 | 136 | |
| 4 | F – 28 | 0.38 | 206 | |
| 5 | A – 4 | 0.84 | 234 | |
| 6 | F – 99 | 0.69 | 292 | |
| 7 | F – 42 | 0.49 | 341 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.