Daily Sunspot Evaluation
Observation Sheet Saturday, 25 April 1953
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)
- 29
- Relative number (R)
- 59
- Observer
- ET
- Reading
- all checks consistent
- File
- 19530425.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 27 | 0.69 | 43 | |
| 2 | A – 1 | 0.85 | 72 | |
| 3 | A – 1 | 0.93 | 73 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.