Daily Sunspot Evaluation
Observation Sheet Friday, 27 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)
- 51
- Relative number (R)
- 121
- Observer
- FY
- Reading
- all checks consistent
- File
- 19560427.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 9 | 0.53 | 5 | |
| 2 | C – 7 | 0.59 | 16 | |
| 3 | A – 10 | 0.36 | 96 | |
| 4 | A – 1 | 0.81 | 214 | |
| 5 | B – 2 | 0.88 | 219 | |
| 6 | C – 9 | 0.92 | 325 | |
| 7 | C – 13 | 0.55 | 285 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.