Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 May 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)
- 3
- Number of spots (f)
- 20
- Relative number (R)
- 50
- Observer
- AK
- Reading
- all checks consistent
- File
- 19520520.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 8 | 0.22 | 90 | |
| 2 | B – 6 | 0.56 | 100 | |
| 3 | D – 6 | 0.18 | 113 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.