Daily Sunspot Evaluation
Observation Sheet Saturday, 22 July 1961
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)
- 28
- Relative number (R)
- 68
- Observer
- PO
- Reading
- all checks consistent
- File
- 19610722.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 20 | 7 | 39E | ||||
| 2 | B – 4 | 1 | 11E | ||||
| 3 | A – 2 | -5 | 25W | ||||
| 4 | I – 2 | 14 | 48W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.