Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 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)
- 24
- Relative number (R)
- 54
- Observer
- ET
- Reading
- all checks consistent
- File
- 19520709.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 12 | 0.25 | 77 | |
| 2 | J – 1 | 0.95 | 82 | |
| 3 | ? – 11 | 0.98 | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.