Daily Sunspot Evaluation
Observation Sheet Sunday, 20 May 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)
- 10
- Number of spots (f)
- 48
- Relative number (R)
- 148
- Observer
- MH
- Reading
- all checks consistent
- File
- 19560520.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.91 | 85 | |
| 2 | J – 1 | 0.84 | 91 | |
| 3 | A – 2 | 0.9 | 94 | |
| 4 | E – 18 | 0.57 | 112 | |
| 5 | B – 3 | 0.84 | 218 | |
| 6 | ? – 1 | 0.98 | 225 | |
| 7 | H – 1 | 0.85 | 227 | |
| 8 | C – 7 | 0.89 | 281 | |
| 9 | C – 4 | 0.96 | 283 | |
| 10 | D – 10 | 0.48 | 348 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.