Daily Sunspot Evaluation
Observation Sheet Thursday, 21 June 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)
- 9
- Number of spots (f)
- 113
- Relative number (R)
- 203
- Observer
- AK
- Reading
- all checks consistent
- File
- 19560621.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.83 | 46 | |
| 2 | E – 50 | 0.37 | 173 | |
| 3 | A – 3 | 0.46 | 214 | |
| 4 | J – 1 | 0.63 | 218 | |
| 5 | A – 2 | 0.84 | 229 | |
| 6 | A – 1 | 0.84 | 292 | |
| 7 | E – 18 | 0.87 | 297 | |
| 8 | B – 17 | 0.29 | 303 | |
| 9 | E – 20 | 0.46 | 309 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.