Daily Sunspot Evaluation
Observation Sheet Saturday, 20 June 1953
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)
- 12
- Relative number (R)
- 32
- Observer
- BS
- Reading
- all checks consistent
- File
- 19530620.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 0.94 | 70 | |
| 2 | D – 11 | 0.13 | 333 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.