Daily Sunspot Evaluation
Observation Sheet Monday, 21 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)
- 11
- Number of spots (f)
- 139
- Relative number (R)
- 249
- Observer
- KA
- Reading
- all checks consistent
- File
- 19560521.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.79 | 88 | |
| 2 | A – 3 | 0.7 | 95 | |
| 3 | A – 6 | 0.79 | 97 | |
| 4 | E – 55 | 0.44 | 127 | |
| 5 | B – 6 | 0.93 | 220 | |
| 6 | H – 2 | 0.93 | 229 | |
| 7 | C – 17 | 0.95 | 279 | |
| 8 | I – 2 | 0.98 | 281 | |
| 9 | A – 2 | 0.74 | 304 | |
| 10 | A – 1 | 0.64 | 318 | |
| 11 | E – 43 | 0.5 | 326 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.