Daily Sunspot Evaluation
Observation Sheet Friday, 25 July 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)
- 4
- Relative number (R)
- 34
- Observer
- MH
- Reading
- all checks consistent
- File
- 19520725.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.33 | 154 | |
| 2 | A – 1 | 0.39 | 154 | |
| 3 | B – 2 | 0.08 | 318 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.