Daily Sunspot Evaluation
Observation Sheet Friday, 20 June 1952
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)
- 4
- Number of spots (f)
- 27
- Relative number (R)
- 67
- Observer
- AK
- Reading
- all checks consistent
- File
- 19520620.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 4 | 0.8 | 69 | |
| 2 | J – 2 | 0.49 | 134 | |
| 3 | C – 15 | 0.57 | 226 | |
| 4 | B – 6 | 0.47 | 295 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.