Daily Sunspot Evaluation
Observation Sheet Saturday, 19 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)
- 2
- Number of spots (f)
- 19
- Relative number (R)
- 39
- Observer
- WG
- Reading
- all checks consistent
- File
- 19520419.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.38 | 30 | |
| 2 | D – 17 | 0.15 | 220 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.