Daily Sunspot Evaluation
Observation Sheet Monday, 9 April 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)
- 37
- Relative number (R)
- 107
- Observer
- ET
- Reading
- all checks consistent
- File
- 19560409.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 18 | 0.62 | 10 | |
| 2 | A – 1 | 0.89 | 34 | |
| 3 | A – 1 | 0.76 | 35 | |
| 4 | J – 1 | 0.92 | 38 | |
| 5 | ? – 1 | 0.98 | 82 | |
| 6 | J – 1 | 0.81 | 84 | |
| 7 | C – 14 | 0.68 | 318 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.