Daily Sunspot Evaluation
Observation Sheet Saturday, 22 September 1951
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)
- 5
- Number of spots (f)
- 72
- Relative number (R)
- 122
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510922.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 14 | 0.18 | 50 | |
| 2 | C – 18 | 0.35 | 110 | |
| 3 | C – 8 | 0.08 | 112 | |
| 4 | B – 7 | 0.86 | 280 | |
| 5 | E – 25 | 0.47 | 308 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.