Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 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)
- 6
- Number of spots (f)
- 61
- Relative number (R)
- 121
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510925.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 0.69 | 111 | |
| 2 | A – 4 | 0.62 | 298 | |
| 3 | C – 27 | 0.38 | 300 | |
| 4 | A – 1 | 0.2 | 307 | |
| 5 | ? – 10 | 0.92 | 307 | |
| 6 | G – 18 | 0.58 | 315 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.