Daily Sunspot Evaluation
Observation Sheet Tuesday, 22 April 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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- AK
- Reading
- all checks consistent
- File
- 19520422.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 2 | 0.92 | 45 | |
| 2 | A – 2 | 0.94 | 49 | |
| 3 | A – 2 | 0.8 | 66 | |
| 4 | E – 18 | 0.75 | 236 | |
| 5 | A – 1 | 0.53 | 266 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.