Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 August 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)
- 4
- Number of spots (f)
- 25
- Relative number (R)
- 65
- Observer
- MH
- Reading
- all checks consistent
- File
- 19520813.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 12 | 0.18 | 60 | |
| 2 | B – 10 | 0.25 | 210 | |
| 3 | A – 2 | 0.42 | 252 | |
| 4 | A – 1 | 0.49 | 289 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.