Daily Sunspot Evaluation
Observation Sheet Thursday, 28 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)
- 64
- Relative number (R)
- 154
- Observer
- AK
- Reading
- all checks consistent
- File
- 19560628.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 12 | 0.78 | 47 | |
| 2 | ? – 1 | 0.98 | 57 | |
| 3 | B – 5 | 0.84 | 63 | |
| 4 | A – 2 | 0.95 | 108 | |
| 5 | B – 5 | 0.83 | 121 | |
| 6 | C – 28 | 0.57 | 154 | |
| 7 | H – 4 | 0.29 | 183 | |
| 8 | B – 4 | 0.8 | 234 | |
| 9 | B – 3 | 0.51 | 298 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.