Daily Sunspot Evaluation
Observation Sheet Saturday, 28 June 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)
- 37
- Relative number (R)
- 77
- Observer
- ET
- Reading
- all checks consistent
- File
- 19520628.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 11 | 0.75 | 100 | |
| 2 | E – 23 | 0.26 | 135 | |
| 3 | A – 1 | 0.55 | 295 | |
| 4 | J – 2 | 0.47 | 299 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.