Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 50
- Relative number (R)
- 80
- Observer
- ET
- Reading
- all checks consistent
- File
- 19520713.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | G – 14 | 0.35 | 73 | |
| 2 | F – 35 | 0.43 | 108 | |
| 3 | A – 1 | 0.71 | 279 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.